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1:14
Metallicity
Metallicity
Metallicity
Metallicity
Don Airey
℗ 2008 Mascot Music Productions & Publishing BV
Released on: 2010-01-01
Auto-generated by YouTube.
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14:46
Metallicity
Metallicity
Metallicity
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8:32
Bryce Experiments - Metallicity and Specular Halo - by David Brinnen.
Bryce Experiments - Metallicity and Specular Halo - by David Brinnen.
Bryce Experiments - Metallicity and Specular Halo - by David Brinnen.
A Bryce 7.1 Pro tutorial aimed at people who are very well versed in Bryce and wish to expand their skills. Exploring material properties and creating a soft...
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2:19
Metallicity - Video Learning - WizScience.com
Metallicity - Video Learning - WizScience.com
Metallicity - Video Learning - WizScience.com
In astronomy and physical cosmology, the "metallicity" or ""Z"", is the fraction of mass of a star or other kind of astronomical object, beyond hydrogen and helium . Most of the physical matter in the universe is in the form of hydrogen and helium, so astronomers conveniently use the blanket term "metals" to refer to all other elements. For example, stars or nebulae that are relatively rich in carbon, nitrogen, oxygen, and neon would be "metal-rich" in astrophysical terms, even though those elements are non-metals in chemistry. This term should not be confused with the usual physical definition of solid metals.
Metallicity within stars
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19:52
Bryce "Nuts and Bolts" - metals, anisotropy and "super" metallicity - by David Brinnen.
Bryce "Nuts and Bolts" - metals, anisotropy and "super" metallicity - by David Brinnen.
Bryce "Nuts and Bolts" - metals, anisotropy and "super" metallicity - by David Brinnen.
A Bryce 7.1 Pro tutorial aimed at people who are moderately well versed in Bryce and wish to expand their skills.
Some additional text is included in the video, you may have to pause the video to read it.
Better viewed in HD - some of the controls in Bryce are quite fiddly and small.
For more tutorials visit http://www.bryce-tutorials.info/
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0:11
The local mass-metallicity relation for HII regions in spiral galaxies
The local mass-metallicity relation for HII regions in spiral galaxies
The local mass-metallicity relation for HII regions in spiral galaxies
3D representation of the local surface mass density Σ, gas metallicity 12+log(O/H) and EW(Hα) relation. The size and color scaling of the data points are lin...
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0:15
FMR: the fundamental metallicity relation, mannucci et al 2010
FMR: the fundamental metallicity relation, mannucci et al 2010
FMR: the fundamental metallicity relation, mannucci et al 2010
The wonderful Fundamental Metallicity Relation from Mannucci, Cresci, Maiolino, Marconi & Gnerucci (2010) 2010MNRAS.408.2115M.
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0:11
The local Mass-Metallicity-SSFR relation as view by CALIFA
The local Mass-Metallicity-SSFR relation as view by CALIFA
The local Mass-Metallicity-SSFR relation as view by CALIFA
3D representation of the local surface mass density Σ, gas metallicity 12+log(O/H) and specific star-formation rate (SSFR) relation as derived from the CALIF...
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18:07
Galaxy Formation Feedback and Metallicity - Yu Lu
Galaxy Formation Feedback and Metallicity - Yu Lu
Galaxy Formation Feedback and Metallicity - Yu Lu
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0:16
How to Pronounce Metallicity
How to Pronounce Metallicity
How to Pronounce Metallicity
Learn how to say Metallicity correctly with emmasaying's "how do you pronounce" free tutorials. @---@---@---@---@---@---@---@---@---@---@---@---@---@ Check o...
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0:18
How to Pronounce Metallicity
How to Pronounce Metallicity
How to Pronounce Metallicity
This video shows you how to pronounce Metallicity
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8:54
The Problem with Metallicity, Stellar Metamorphosis
The Problem with Metallicity, Stellar Metamorphosis
The Problem with Metallicity, Stellar Metamorphosis
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1:21
Tidal dwarf galaxy metallicity
Tidal dwarf galaxy metallicity
Tidal dwarf galaxy metallicity
Chemo-dynamical simulation of a tidal dwarf galaxy. Time evolution of a 2D gas metallicity slice through the 3D simulation box is shown here. More informatio...
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0:28
Metallicity Meaning
Metallicity Meaning
Metallicity Meaning
Video shows what metallicity means. The abundance of elements heavier than helium in stars as a result of nucleosynthesis. Metallicity Meaning. How to pronounce, definition audio dictionary. How to say metallicity. Powered by MaryTTS, Wiktionary
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20:50
Duncan Forbes "Metallicity maps of galaxies in observations and simulations"
Duncan Forbes "Metallicity maps of galaxies in observations and simulations"
Duncan Forbes "Metallicity maps of galaxies in observations and simulations"
Duncan Forbes, Swinburne, "Metallicity maps of galaxies in observations and simulations" 2013 Santa Cruz Galaxy Workshop University of California, Santa Cruz...
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0:11
The global Mass-Metallicity-SFR relation as view by CALIFA
The global Mass-Metallicity-SFR relation as view by CALIFA
The global Mass-Metallicity-SFR relation as view by CALIFA
3D representation of the global (integrated) Mass, gas metallicity 12+log(O/H) and star-formation rate (SFR) relation as derived from the CALIFA survey. Resu...
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1:01
Stellar Composition over Time (M = Msun, Metallicity = 0.02)
Stellar Composition over Time (M = Msun, Metallicity = 0.02)
Stellar Composition over Time (M = Msun, Metallicity = 0.02)
Data courtesy of Rich Townsend's EZ-web http://www.astro.wisc.edu/~townsend/static.php?ref=ez-web and annotations from Figure 13.4 in an Introduction to Mode...
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3:16
test8 "Metallicity"
test8 "Metallicity"
test8 "Metallicity"
t8-13#4
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15:21
Gas Infall and Metallicity Drops in Star-forming Dwarf Galaxies - Daniel Ceverino
Gas Infall and Metallicity Drops in Star-forming Dwarf Galaxies - Daniel Ceverino
Gas Infall and Metallicity Drops in Star-forming Dwarf Galaxies - Daniel Ceverino
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0:28
Metallicity Condition and Electronic Density of States in Achiral Single-Walled Carbon Nanotubes
Metallicity Condition and Electronic Density of States in Achiral Single-Walled Carbon Nanotubes
Metallicity Condition and Electronic Density of States in Achiral Single-Walled Carbon Nanotubes
http://demonstrations.wolfram.com/MetallicityConditionAndElectronicDensityOfStatesInAchiralSin The Wolfram Demonstrations Project contains thousands of free ...
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23:20
Investigating the Pressure Support and Metallicity Bimodality of the CGM - Cameron Hummels
Investigating the Pressure Support and Metallicity Bimodality of the CGM - Cameron Hummels
Investigating the Pressure Support and Metallicity Bimodality of the CGM - Cameron Hummels
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60:29
CITA 380: Low metallicity star formation: a nursery for compact binary mergers?
CITA 380: Low metallicity star formation: a nursery for compact binary mergers?
CITA 380: Low metallicity star formation: a nursery for compact binary mergers?
Title: Low metallicity star formation: a nursery for compact binary mergers?
Speaker: Richard O'Shaughnessy (U. of Wisconsim, Milwaukee)
Date: 2011-10-05
Slides: http://www.cita.utoronto.ca/presentations/380.pdf
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6:29
Space Fan News #31: The Star That Shouldn't Exist; Diamonds in the Sky
Space Fan News #31: The Star That Shouldn't Exist; Diamonds in the Sky
Space Fan News #31: The Star That Shouldn't Exist; Diamonds in the Sky
Use it, it's yours! http://facebook.com/SpaceFan There was a really interesting story from the European Southern Observatory this week along with the Diamond...
Metallicity
Metallicity
Don Airey
℗ 2008 Mascot Music Productions & Publishing BV
Released on: 2010-01-01
Auto-generated by YouTube.
wn.com/Metallicity
Metallicity
Don Airey
℗ 2008 Mascot Music Productions & Publishing BV
Released on: 2010-01-01
Auto-generated by YouTube.
- published: 08 Nov 2014
- views: 0
Bryce Experiments - Metallicity and Specular Halo - by David Brinnen.
A Bryce 7.1 Pro tutorial aimed at people who are very well versed in Bryce and wish to expand their skills. Exploring material properties and creating a soft...
wn.com/Bryce Experiments Metallicity And Specular Halo By David Brinnen.
A Bryce 7.1 Pro tutorial aimed at people who are very well versed in Bryce and wish to expand their skills. Exploring material properties and creating a soft...
Metallicity - Video Learning - WizScience.com
In astronomy and physical cosmology, the "metallicity" or ""Z"", is the fraction of mass of a star or other kind of astronomical object, beyond hydrogen and helium . Most of the physical matter in the universe is in the form of hydrogen and helium, so astronomers conveniently use the blanket term "metals" to refer to all other elements. For example, stars or nebulae that are relatively rich in carbon, nitrogen, oxygen, and neon would be "metal-rich" in astrophysical terms, even though those elements are non-metals in chemistry. This term should not be confused with the usual physical definition of solid metals.
Metallicity within stars and other astronomical objects is an approximate estimation of their chemical abundances that change over time by the mechanisms of stellar evolution,
and therefore provide an indication of their age.
In cosmological terms, the universe is also chemically evolving. According to the Big Bang Theory, the early universe first consisted of hydrogen and helium, with trace amounts of lithium and beryllium, but no heavier elements. Through the process of stellar evolution, where stars at the end of their lives discard most of their mass by stellar winds or explode as supernovae, the metal content of the Galaxy and the universe increases. It is postulated that older generations of stars generally have lower metallicities than those of younger generations.
Observed changes in the chemical abundances of different types of stars, based on the spectral peculiarities that were later attributed to metallicity, led astronomer Walter Baade in 1944 to propose the existence of two different populations of stars.
These became commonly known as "Population I" and "Population II" stars. A third stellar population was introduced in 1978, known as "Population III" stars.
Wiz Science™ is "the" learning channel for children and all ages.
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Disclaimer: This video is for your information only. The author or publisher does not guarantee the accuracy of the content presented in this video. USE AT YOUR OWN RISK.
Background Music:
"The Place Inside" by Silent Partner (royalty-free) from YouTube Audio Library.
This video uses material/images from https://en.wikipedia.org/wiki/Metallicity, which is released under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/by-sa/3.0/ . This video is licensed under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/by-sa/3.0/ . To reuse/adapt the content in your own work, you must comply with the license terms.
wn.com/Metallicity Video Learning Wizscience.Com
In astronomy and physical cosmology, the "metallicity" or ""Z"", is the fraction of mass of a star or other kind of astronomical object, beyond hydrogen and helium . Most of the physical matter in the universe is in the form of hydrogen and helium, so astronomers conveniently use the blanket term "metals" to refer to all other elements. For example, stars or nebulae that are relatively rich in carbon, nitrogen, oxygen, and neon would be "metal-rich" in astrophysical terms, even though those elements are non-metals in chemistry. This term should not be confused with the usual physical definition of solid metals.
Metallicity within stars and other astronomical objects is an approximate estimation of their chemical abundances that change over time by the mechanisms of stellar evolution,
and therefore provide an indication of their age.
In cosmological terms, the universe is also chemically evolving. According to the Big Bang Theory, the early universe first consisted of hydrogen and helium, with trace amounts of lithium and beryllium, but no heavier elements. Through the process of stellar evolution, where stars at the end of their lives discard most of their mass by stellar winds or explode as supernovae, the metal content of the Galaxy and the universe increases. It is postulated that older generations of stars generally have lower metallicities than those of younger generations.
Observed changes in the chemical abundances of different types of stars, based on the spectral peculiarities that were later attributed to metallicity, led astronomer Walter Baade in 1944 to propose the existence of two different populations of stars.
These became commonly known as "Population I" and "Population II" stars. A third stellar population was introduced in 1978, known as "Population III" stars.
Wiz Science™ is "the" learning channel for children and all ages.
SUBSCRIBE TODAY
Disclaimer: This video is for your information only. The author or publisher does not guarantee the accuracy of the content presented in this video. USE AT YOUR OWN RISK.
Background Music:
"The Place Inside" by Silent Partner (royalty-free) from YouTube Audio Library.
This video uses material/images from https://en.wikipedia.org/wiki/Metallicity, which is released under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/by-sa/3.0/ . This video is licensed under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/by-sa/3.0/ . To reuse/adapt the content in your own work, you must comply with the license terms.
- published: 29 Sep 2015
- views: 1
Bryce "Nuts and Bolts" - metals, anisotropy and "super" metallicity - by David Brinnen.
A Bryce 7.1 Pro tutorial aimed at people who are moderately well versed in Bryce and wish to expand their skills.
Some additional text is included in the video, you may have to pause the video to read it.
Better viewed in HD - some of the controls in Bryce are quite fiddly and small.
For more tutorials visit http://www.bryce-tutorials.info/
wn.com/Bryce Nuts And Bolts Metals, Anisotropy And Super Metallicity By David Brinnen.
A Bryce 7.1 Pro tutorial aimed at people who are moderately well versed in Bryce and wish to expand their skills.
Some additional text is included in the video, you may have to pause the video to read it.
Better viewed in HD - some of the controls in Bryce are quite fiddly and small.
For more tutorials visit http://www.bryce-tutorials.info/
- published: 10 Oct 2013
- views: 50
The local mass-metallicity relation for HII regions in spiral galaxies
3D representation of the local surface mass density Σ, gas metallicity 12+log(O/H) and EW(Hα) relation. The size and color scaling of the data points are lin...
wn.com/The Local Mass Metallicity Relation For Hii Regions In Spiral Galaxies
3D representation of the local surface mass density Σ, gas metallicity 12+log(O/H) and EW(Hα) relation. The size and color scaling of the data points are lin...
FMR: the fundamental metallicity relation, mannucci et al 2010
The wonderful Fundamental Metallicity Relation from Mannucci, Cresci, Maiolino, Marconi & Gnerucci (2010) 2010MNRAS.408.2115M.
wn.com/Fmr The Fundamental Metallicity Relation, Mannucci Et Al 2010
The wonderful Fundamental Metallicity Relation from Mannucci, Cresci, Maiolino, Marconi & Gnerucci (2010) 2010MNRAS.408.2115M.
- published: 22 Dec 2010
- views: 101
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author:
fmannucci
The local Mass-Metallicity-SSFR relation as view by CALIFA
3D representation of the local surface mass density Σ, gas metallicity 12+log(O/H) and specific star-formation rate (SSFR) relation as derived from the CALIF...
wn.com/The Local Mass Metallicity Ssfr Relation As View By Califa
3D representation of the local surface mass density Σ, gas metallicity 12+log(O/H) and specific star-formation rate (SSFR) relation as derived from the CALIF...
How to Pronounce Metallicity
Learn how to say Metallicity correctly with emmasaying's "how do you pronounce" free tutorials. @---@---@---@---@---@---@---@---@---@---@---@---@---@ Check o...
wn.com/How To Pronounce Metallicity
Learn how to say Metallicity correctly with emmasaying's "how do you pronounce" free tutorials. @---@---@---@---@---@---@---@---@---@---@---@---@---@ Check o...
How to Pronounce Metallicity
This video shows you how to pronounce Metallicity
wn.com/How To Pronounce Metallicity
This video shows you how to pronounce Metallicity
- published: 29 May 2015
- views: 0
Tidal dwarf galaxy metallicity
Chemo-dynamical simulation of a tidal dwarf galaxy. Time evolution of a 2D gas metallicity slice through the 3D simulation box is shown here. More informatio...
wn.com/Tidal Dwarf Galaxy Metallicity
Chemo-dynamical simulation of a tidal dwarf galaxy. Time evolution of a 2D gas metallicity slice through the 3D simulation box is shown here. More informatio...
Metallicity Meaning
Video shows what metallicity means. The abundance of elements heavier than helium in stars as a result of nucleosynthesis. Metallicity Meaning. How to pronounce, definition audio dictionary. How to say metallicity. Powered by MaryTTS, Wiktionary
wn.com/Metallicity Meaning
Video shows what metallicity means. The abundance of elements heavier than helium in stars as a result of nucleosynthesis. Metallicity Meaning. How to pronounce, definition audio dictionary. How to say metallicity. Powered by MaryTTS, Wiktionary
- published: 30 Apr 2015
- views: 0
Duncan Forbes "Metallicity maps of galaxies in observations and simulations"
Duncan Forbes, Swinburne, "Metallicity maps of galaxies in observations and simulations" 2013 Santa Cruz Galaxy Workshop University of California, Santa Cruz...
wn.com/Duncan Forbes Metallicity Maps Of Galaxies In Observations And Simulations
Duncan Forbes, Swinburne, "Metallicity maps of galaxies in observations and simulations" 2013 Santa Cruz Galaxy Workshop University of California, Santa Cruz...
- published: 15 Aug 2013
- views: 42
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author:
UC-HiPACC
The global Mass-Metallicity-SFR relation as view by CALIFA
3D representation of the global (integrated) Mass, gas metallicity 12+log(O/H) and star-formation rate (SFR) relation as derived from the CALIFA survey. Resu...
wn.com/The Global Mass Metallicity Sfr Relation As View By Califa
3D representation of the global (integrated) Mass, gas metallicity 12+log(O/H) and star-formation rate (SFR) relation as derived from the CALIFA survey. Resu...
Stellar Composition over Time (M = Msun, Metallicity = 0.02)
Data courtesy of Rich Townsend's EZ-web http://www.astro.wisc.edu/~townsend/static.php?ref=ez-web and annotations from Figure 13.4 in an Introduction to Mode...
wn.com/Stellar Composition Over Time (M Msun, Metallicity 0.02)
Data courtesy of Rich Townsend's EZ-web http://www.astro.wisc.edu/~townsend/static.php?ref=ez-web and annotations from Figure 13.4 in an Introduction to Mode...
Metallicity Condition and Electronic Density of States in Achiral Single-Walled Carbon Nanotubes
http://demonstrations.wolfram.com/MetallicityConditionAndElectronicDensityOfStatesInAchiralSin The Wolfram Demonstrations Project contains thousands of free ...
wn.com/Metallicity Condition And Electronic Density Of States In Achiral Single Walled Carbon Nanotubes
http://demonstrations.wolfram.com/MetallicityConditionAndElectronicDensityOfStatesInAchiralSin The Wolfram Demonstrations Project contains thousands of free ...
CITA 380: Low metallicity star formation: a nursery for compact binary mergers?
Title: Low metallicity star formation: a nursery for compact binary mergers?
Speaker: Richard O'Shaughnessy (U. of Wisconsim, Milwaukee)
Date: 2011-10-05
Slides: http://www.cita.utoronto.ca/presentations/380.pdf
wn.com/Cita 380 Low Metallicity Star Formation A Nursery For Compact Binary Mergers
Title: Low metallicity star formation: a nursery for compact binary mergers?
Speaker: Richard O'Shaughnessy (U. of Wisconsim, Milwaukee)
Date: 2011-10-05
Slides: http://www.cita.utoronto.ca/presentations/380.pdf
- published: 05 Feb 2014
- views: 1
Space Fan News #31: The Star That Shouldn't Exist; Diamonds in the Sky
Use it, it's yours! http://facebook.com/SpaceFan There was a really interesting story from the European Southern Observatory this week along with the Diamond...
wn.com/Space Fan News 31 The Star That Shouldn't Exist Diamonds In The Sky
Use it, it's yours! http://facebook.com/SpaceFan There was a really interesting story from the European Southern Observatory this week along with the Diamond...
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92:39
Keck Science Meeting 2012 Session 6
Keck Science Meeting 2012 Session 6
Keck Science Meeting 2012 Session 6
Talks in Session 6: 00:00:33 Marc Rafelski (Caltech/IPAC): "Metallicity of Damped Ly-alpha Systems out to z~5" 00:15:48 Janet Colucci (UCSC): "The Detailed C...
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68:54
Colour Bimodality (part Two) or The Devil is in the Details
Colour Bimodality (part Two) or The Devil is in the Details
Colour Bimodality (part Two) or The Devil is in the Details
Dott. Michele Cantiello - INAF Osservatorio di Teramo: "Globular cluster (GC) systems exhibit a bimodal optical colour distribution in almost all luminous an...
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54:00
Life in Distant Galaxies [BEYOND UNIVERSE 2015]
Life in Distant Galaxies [BEYOND UNIVERSE 2015]
Life in Distant Galaxies [BEYOND UNIVERSE 2015]
In astrobiology and planetary astrophysics, the galactic habitable zone is the region of a galaxy in which life is most likely to develop. More specifically, the concept of a galactic habitable zone incorporates various factors, such as metallicity and the rate of major catastrophes such as supernovae, in order to calculate which regions of the galaxy are more likely to form terrestrial planets, initially develop simple life, and provide a suitable environment for this life to evolve and advance. For the Milky Way this region is commonly believed to be an annulus with an outer radius of about 10 kiloparsecs and an inner radius close to the Ga
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27:26
Documentary Films: The Search for Earth Like Planets
Documentary Films: The Search for Earth Like Planets
Documentary Films: The Search for Earth Like Planets
Documentary Films: The Search for Earth Like Planets The first exoplanet to be observed circling a Sun-like star was an enormous roaster, spotted by two Swis...
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54:51
Dianna Cowern, a/k/a Physics Girl | Talks at Google
Dianna Cowern, a/k/a Physics Girl | Talks at Google
Dianna Cowern, a/k/a Physics Girl | Talks at Google
Physics enthusiast Dianna Cowern, MIT '11, visited Google's office in Cambridge, MA to discuss how a passion for science, a thirst for knowledge and feeling that she did not fit in led to a career in science communication.
Dianna Cowern is the creator of YouTube star Physics Girl: http://www.physicsgirl.org/about/
Driving tractors on a farm growing up in Hawaii could not have prepared her for the science and engineering work she would later pursue. She researched dark matter with Prof. Jocelyn Monroe at MIT, and low-metallicity stars with Prof. Anna Frebel at the Harvard-Smithsonian Center for Astrophysics. Eventually, she started exercis
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60:15
CfA Colloquium - Gurtina Besla, December 5, 2013
CfA Colloquium - Gurtina Besla, December 5, 2013
CfA Colloquium - Gurtina Besla, December 5, 2013
Harvard-Smithsonian Center for Astrophysics The Dwarf Galaxy Zoo Gurtina Besla December 5, 2013 Dwarf galaxies are the most numerous type of galaxy in our un...
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35:58
RR Lyrae in GALEX
RR Lyrae in GALEX
RR Lyrae in GALEX
Dott. G.Giuffrida - ASI Science Data Center (Roma): The Galaxy Evolution Explorer (GALEX) scanned the whole galactic halo during 10 years of operations, observing also several RR Lyrae. We are analyzing all the RR Lyrae observed by the telescope, starting from a list of well-known variables obtained merging the catalogs asas3, catalina, dambis, linear, loneos, NSVS, ogle3, quest, rotse and sekbo. The main target of this work is the analysis of the metallicity distribution of the Galactic Halo. I will show the first results of this study, starting from an analysis of the Period-Color-Metallicity relation in the farUV-NIR.
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48:23
Universe documentary Voyager Journey to the Stars
Universe documentary Voyager Journey to the Stars
Universe documentary Voyager Journey to the Stars
Universe documentary Voyager Journey to the Stars
For more videos please SUBSCRIBE to „Space documentary 2015“ channel here: https://www.youtube.com/channel/UCG6LPPDkqWD48HvdiES6W2Q?sub_confirmation=1
A star is a luminous sphere of plasma held together by its own gravity. The nearest star to Earth is the Sun. Other stars, mostly in the Milky Way, are visible from Earth during the night, appearing as a multitude of fixed luminous points in the sky due to their immense distance from Earth. Historically, the most prominent stars were grouped into constellations and asterisms, and the brightest stars gained proper names. Extensive catalogues of
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56:34
Local Laboratories for high-redshift astrophysics
Local Laboratories for high-redshift astrophysics
Local Laboratories for high-redshift astrophysics
Speaker: Alaina Henry (GSFC)
Abstract:
The Lyman alpha emission line is an important diagnostic tool, used widely in attempts to understand the properties of galaxies and the intergalactic medium at early cosmic times. With a relative ease of observation at z > 2-3, and the potential to constrain outflows, dust, and neutral gas in the circumgalactic and intergalactic media, Lyman Alpha surveys have grown dramatically in the last decade. However, we are still challenged to predict Lyman alpha emission (or lack thereof); consequently, our ability to interpret high-redshift results is limited. I this talk, I will review some of the key hi
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47:28
6. Microlensing, Astrometry and Other Methods
6. Microlensing, Astrometry and Other Methods
6. Microlensing, Astrometry and Other Methods
Frontiers/Controversies in Astrophysics (ASTR 160) The class begins with a discussion on transits important astronomical events that help astronomers to find...
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60:37
Documentary on Stars HD
Documentary on Stars HD
Documentary on Stars HD
A star is a massive, luminous sphere of plasma held together by its own gravity. The nearest star to Earth is the Sun, which is the source of most of the planet's energy. Other stars are visible from Earth during the night, appearing as a multitude of fixed luminous points due to their immense distance. Historically, the most prominent stars were grouped into constellations and asterisms, and the brightest stars gained proper names. Extensive catalogues of stars have been assembled by astronomers, which provide standardized star designations.
For at least a portion of its life, a star shines due to thermonuclear fusion of hydrogen into heliu
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72:05
Tanmoy's Thesis Colloquium
Tanmoy's Thesis Colloquium
Tanmoy's Thesis Colloquium
The Diversity and Versatility of Gamma-ray Bursts
Gamma-ray bursts (GRBs) are the most energetic explosions in the Universe, thus providing a unique laboratory for the study of extreme astrophysical processes. In parallel, their large luminosity makes GRBs a premier probe of the early Universe. My thesis has explored and exploited both aspects of GRB science, and in this talk I will highlight the versatility of GRBs through two related studies: i) probing the nature and composition of the relativistic outflows in GRBs through the first multi-wavelength detection and characterization of reverse shocks, and ii) utilizing GRBs to measure the e
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29:10
CoRoT3-KASC7 #02 - J. Montalban - Ensemble asteroseismology, clusters, and scaling laws
CoRoT3-KASC7 #02 - J. Montalban - Ensemble asteroseismology, clusters, and scaling laws
CoRoT3-KASC7 #02 - J. Montalban - Ensemble asteroseismology, clusters, and scaling laws
Conference given during The Space photometry Revolution, CoRoT Symposium 3, Kepler KASC-7 joint meeting (6-11 Jul 2014, Toulouse, France)
http://corot3-kasc7.sciencesconf.org/
Session: 1 - Probing stellar structure and evolution with asteroseismology
Date: July 7, 2014
Title: Ensemble asteroseismology, clusters, and scaling laws
Speaker: Josefina Montalban
Abstract: The detection of radial and non-radial solar-like oscillations in thousands of G-K giants with CoRoT and Kepler has provided surprising results with a great and unexpected impact on other astrophysical domains. The available global seismic parameters allow, via scaling relations
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43:46
They Come From The Fiery Heart Of The Cosmos - Heavy Metals Documentary - National TV
They Come From The Fiery Heart Of The Cosmos - Heavy Metals Documentary - National TV
They Come From The Fiery Heart Of The Cosmos - Heavy Metals Documentary - National TV
They Come From The Fiery Heart Of The Cosmos - Heavy Metals Documentary - Films
A metal is a product (a component, substance, or blend) that is commonly tough, opaque, shiny, and also has great electrical as well as thermal conductivity. Metals are normally malleable-- that is, they can be hammered or pressed completely unfit without breaking or cracking-- along with fusible (able to be merged or melted) as well as ductile (able to be extended into a thin cable). [3] Regarding 91 of the 118 elements in the periodic table of elements are metals (some components appear in both metallic as well as non-metallic forms).
The meaning of "steel" va
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59:07
CASS Seminar 11 December 2013: Evan Kirby (UCI)
CASS Seminar 11 December 2013: Evan Kirby (UCI)
CASS Seminar 11 December 2013: Evan Kirby (UCI)
Dwarf Galaxies: The Nexus of Dark Matter and Chemical Evolution The Local Group's dwarf galaxies are near enough for exquisitely detailed, resolved stellar spectroscopy and diverse enough...
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58:41
CASS Seminar 2 April 2014: Tucker Jones (UCSB)
CASS Seminar 2 April 2014: Tucker Jones (UCSB)
CASS Seminar 2 April 2014: Tucker Jones (UCSB)
Bigger and brighter: detailed properties of gravitationally lensed galaxies Gravitational lensing is a powerful tool for studying the formation of galaxies in the early universe. I will present...
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25:21
CoRoT3-KASC7 #15 - M. Havel - An homogeneous study of 400 exoplanets with CEPAM
CoRoT3-KASC7 #15 - M. Havel - An homogeneous study of 400 exoplanets with CEPAM
CoRoT3-KASC7 #15 - M. Havel - An homogeneous study of 400 exoplanets with CEPAM
Conference given during The Space photometry Revolution, CoRoT Symposium 3, Kepler KASC-7 joint meeting (6-11 Jul 2014, Toulouse, France)
http://corot3-kasc7.sciencesconf.org/
Session: 2 - Extrasolar planets and planet systems
Date: July 8, 2014
Title: An homogeneous study of 400 exoplanets with CEPAM: evolution and compositions
Speaker: Mathieu Havel
Abstract: The discovery of more than 400 hundred giant exoplanets transiting in front of their parent star allows detailed studies of a statistically significant sample of stars and planets. Using the tools developed to constrain the properties of the CoRoT stars and planets with new equations
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45:16
Let's Play 100% Orange Juice with PockyKunoichi & Taco Thief Part 3
Let's Play 100% Orange Juice with PockyKunoichi & Taco Thief Part 3
Let's Play 100% Orange Juice with PockyKunoichi & Taco Thief Part 3
Okay so here is the next part. Yup. I'm just going to nonchalantly shove it down your throat with some milk and barbecue sauce. Why that combination you ask? You don't get to ask, you have duct tape on your mouth. You have just now noticed the duct tape on your mouth.
look down.
look back up.
nope still duct tape on your mouth.
I lied. There was never duct tape on your mouth. It was masking tape. DUN DUN DUN. Except it wasn't. There was nothing. You've been in the drugs again haven't you.
What? Don't give me that look. We both know you like dat Fun Dip. MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
Eucalyptus
Okay, I got the real masking tape now. He
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53:50
TYT Hour - July 21st, 2010
TYT Hour - July 21st, 2010
TYT Hour - July 21st, 2010
http://www.theyoungturks.com/membership New TYT Facebook Page(!): Subscribe to the FREE Video Podcast on iTunes: http://bit.ly/d0zlmP Follow us on Twitter: h...
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63:33
Engaging Stakeholders in High School Improvement Efforts
Engaging Stakeholders in High School Improvement Efforts
Engaging Stakeholders in High School Improvement Efforts
Panelists discuss the important role of stakeholder engagement in high school improvement efforts, including perspectives on community-based supports and wra...
Keck Science Meeting 2012 Session 6
Talks in Session 6: 00:00:33 Marc Rafelski (Caltech/IPAC): "Metallicity of Damped Ly-alpha Systems out to z~5" 00:15:48 Janet Colucci (UCSC): "The Detailed C...
wn.com/Keck Science Meeting 2012 Session 6
Talks in Session 6: 00:00:33 Marc Rafelski (Caltech/IPAC): "Metallicity of Damped Ly-alpha Systems out to z~5" 00:15:48 Janet Colucci (UCSC): "The Detailed C...
Colour Bimodality (part Two) or The Devil is in the Details
Dott. Michele Cantiello - INAF Osservatorio di Teramo: "Globular cluster (GC) systems exhibit a bimodal optical colour distribution in almost all luminous an...
wn.com/Colour Bimodality (Part Two) Or The Devil Is In The Details
Dott. Michele Cantiello - INAF Osservatorio di Teramo: "Globular cluster (GC) systems exhibit a bimodal optical colour distribution in almost all luminous an...
Life in Distant Galaxies [BEYOND UNIVERSE 2015]
In astrobiology and planetary astrophysics, the galactic habitable zone is the region of a galaxy in which life is most likely to develop. More specifically, the concept of a galactic habitable zone incorporates various factors, such as metallicity and the rate of major catastrophes such as supernovae, in order to calculate which regions of the galaxy are more likely to form terrestrial planets, initially develop simple life, and provide a suitable environment for this life to evolve and advance. For the Milky Way this region is commonly believed to be an annulus with an outer radius of about 10 kiloparsecs and an inner radius close to the Galactic Center, both of which lack hard boundaries.
Galactic habitable zone theory, however, has been criticized due to an inability to quantify accurately the factors making a region of the galaxy good for the emergence of life.[2] In addition, computer simulations suggest that stars may change their orbits around the galactic center significantly, therefore challenging at least part of the view that some areas of the galaxy are necessarily more life-supporting than others.
As well as being located in a region of the galaxy that is chemically advantageous for the development of life, a star must also avoid an excessive number of catastrophic cosmic events with the potential to damage life on its otherwise habitable planets. Nearby supernovae, for example, have the potential to severely harm life on a planet; with excessive frequency, such catastrophic outbursts have the potential to sterilize an entire region of a galaxy for billions of years. The galactic bulge, for example, experienced an initial wave of extremely rapid star formation, triggering a cascade of supernovae that for five billion years left that area almost completely unable to develop life.
In addition to supernovae, gamma-ray bursts, excessive amounts of radiation, and gravitational perturbations, various other events have been proposed to affect the distribution of life within the galaxy. These include, controversially, such proposals as "galactic tides" with the potential to induce cometary impacts or even cold bodies of dark matter that pass through organisms and induce genetic mutations. However, the impact of many of these events may be difficult to quantify.
wn.com/Life In Distant Galaxies Beyond Universe 2015
In astrobiology and planetary astrophysics, the galactic habitable zone is the region of a galaxy in which life is most likely to develop. More specifically, the concept of a galactic habitable zone incorporates various factors, such as metallicity and the rate of major catastrophes such as supernovae, in order to calculate which regions of the galaxy are more likely to form terrestrial planets, initially develop simple life, and provide a suitable environment for this life to evolve and advance. For the Milky Way this region is commonly believed to be an annulus with an outer radius of about 10 kiloparsecs and an inner radius close to the Galactic Center, both of which lack hard boundaries.
Galactic habitable zone theory, however, has been criticized due to an inability to quantify accurately the factors making a region of the galaxy good for the emergence of life.[2] In addition, computer simulations suggest that stars may change their orbits around the galactic center significantly, therefore challenging at least part of the view that some areas of the galaxy are necessarily more life-supporting than others.
As well as being located in a region of the galaxy that is chemically advantageous for the development of life, a star must also avoid an excessive number of catastrophic cosmic events with the potential to damage life on its otherwise habitable planets. Nearby supernovae, for example, have the potential to severely harm life on a planet; with excessive frequency, such catastrophic outbursts have the potential to sterilize an entire region of a galaxy for billions of years. The galactic bulge, for example, experienced an initial wave of extremely rapid star formation, triggering a cascade of supernovae that for five billion years left that area almost completely unable to develop life.
In addition to supernovae, gamma-ray bursts, excessive amounts of radiation, and gravitational perturbations, various other events have been proposed to affect the distribution of life within the galaxy. These include, controversially, such proposals as "galactic tides" with the potential to induce cometary impacts or even cold bodies of dark matter that pass through organisms and induce genetic mutations. However, the impact of many of these events may be difficult to quantify.
- published: 15 May 2015
- views: 0
Documentary Films: The Search for Earth Like Planets
Documentary Films: The Search for Earth Like Planets The first exoplanet to be observed circling a Sun-like star was an enormous roaster, spotted by two Swis...
wn.com/Documentary Films The Search For Earth Like Planets
Documentary Films: The Search for Earth Like Planets The first exoplanet to be observed circling a Sun-like star was an enormous roaster, spotted by two Swis...
Dianna Cowern, a/k/a Physics Girl | Talks at Google
Physics enthusiast Dianna Cowern, MIT '11, visited Google's office in Cambridge, MA to discuss how a passion for science, a thirst for knowledge and feeling that she did not fit in led to a career in science communication.
Dianna Cowern is the creator of YouTube star Physics Girl: http://www.physicsgirl.org/about/
Driving tractors on a farm growing up in Hawaii could not have prepared her for the science and engineering work she would later pursue. She researched dark matter with Prof. Jocelyn Monroe at MIT, and low-metallicity stars with Prof. Anna Frebel at the Harvard-Smithsonian Center for Astrophysics. Eventually, she started exercising the nerdy side of her brain on YouTube as Physics Girl before (and while) heading to UCSD as a science outreach coordinator.
wn.com/Dianna Cowern, A K A Physics Girl | Talks At Google
Physics enthusiast Dianna Cowern, MIT '11, visited Google's office in Cambridge, MA to discuss how a passion for science, a thirst for knowledge and feeling that she did not fit in led to a career in science communication.
Dianna Cowern is the creator of YouTube star Physics Girl: http://www.physicsgirl.org/about/
Driving tractors on a farm growing up in Hawaii could not have prepared her for the science and engineering work she would later pursue. She researched dark matter with Prof. Jocelyn Monroe at MIT, and low-metallicity stars with Prof. Anna Frebel at the Harvard-Smithsonian Center for Astrophysics. Eventually, she started exercising the nerdy side of her brain on YouTube as Physics Girl before (and while) heading to UCSD as a science outreach coordinator.
- published: 17 Jun 2015
- views: 502
CfA Colloquium - Gurtina Besla, December 5, 2013
Harvard-Smithsonian Center for Astrophysics The Dwarf Galaxy Zoo Gurtina Besla December 5, 2013 Dwarf galaxies are the most numerous type of galaxy in our un...
wn.com/Cfa Colloquium Gurtina Besla, December 5, 2013
Harvard-Smithsonian Center for Astrophysics The Dwarf Galaxy Zoo Gurtina Besla December 5, 2013 Dwarf galaxies are the most numerous type of galaxy in our un...
RR Lyrae in GALEX
Dott. G.Giuffrida - ASI Science Data Center (Roma): The Galaxy Evolution Explorer (GALEX) scanned the whole galactic halo during 10 years of operations, observing also several RR Lyrae. We are analyzing all the RR Lyrae observed by the telescope, starting from a list of well-known variables obtained merging the catalogs asas3, catalina, dambis, linear, loneos, NSVS, ogle3, quest, rotse and sekbo. The main target of this work is the analysis of the metallicity distribution of the Galactic Halo. I will show the first results of this study, starting from an analysis of the Period-Color-Metallicity relation in the farUV-NIR.
wn.com/Rr Lyrae In Galex
Dott. G.Giuffrida - ASI Science Data Center (Roma): The Galaxy Evolution Explorer (GALEX) scanned the whole galactic halo during 10 years of operations, observing also several RR Lyrae. We are analyzing all the RR Lyrae observed by the telescope, starting from a list of well-known variables obtained merging the catalogs asas3, catalina, dambis, linear, loneos, NSVS, ogle3, quest, rotse and sekbo. The main target of this work is the analysis of the metallicity distribution of the Galactic Halo. I will show the first results of this study, starting from an analysis of the Period-Color-Metallicity relation in the farUV-NIR.
- published: 24 Oct 2014
- views: 0
Universe documentary Voyager Journey to the Stars
Universe documentary Voyager Journey to the Stars
For more videos please SUBSCRIBE to „Space documentary 2015“ channel here: https://www.youtube.com/channel/UCG6LPPDkqWD48HvdiES6W2Q?sub_confirmation=1
A star is a luminous sphere of plasma held together by its own gravity. The nearest star to Earth is the Sun. Other stars, mostly in the Milky Way, are visible from Earth during the night, appearing as a multitude of fixed luminous points in the sky due to their immense distance from Earth. Historically, the most prominent stars were grouped into constellations and asterisms, and the brightest stars gained proper names. Extensive catalogues of stars have been assembled by astronomers, which provide standardized star designations.
For at least a portion of its life, a star shines due to thermonuclear fusion of hydrogen into helium in its core, releasing energy that traverses the star's interior and then radiates into outer space. Once the hydrogen in the core of a star is nearly exhausted, almost all naturally occurring elements heavier than helium are created by stellar nucleosynthesis during the star's lifetime and, for some stars, by supernova nucleosynthesis when it explodes. Near the end of its life, a star can also contain degenerate matter. Astronomers can determine the mass, age, metallicity (chemical composition), and many other properties of a star by observing its motion through space, luminosity, and spectrum respectively. The total mass of a star is the principal determinant of its evolution and eventual fate. Other characteristics of a star, including diameter and temperature, change over its life, while the star's environment affects its rotation and movement. A plot of the temperature of many stars against their luminosities, known as a Hertzsprung–Russell diagram (H–R diagram), allows the age and evolutionary state of a star to be determined.
the universe documentary, space documentary, bbc documentary universe, space universe documentary, universe full documentary, universe documentary 2015, universe documentary national geographic, stars documentary,
wn.com/Universe Documentary Voyager Journey To The Stars
Universe documentary Voyager Journey to the Stars
For more videos please SUBSCRIBE to „Space documentary 2015“ channel here: https://www.youtube.com/channel/UCG6LPPDkqWD48HvdiES6W2Q?sub_confirmation=1
A star is a luminous sphere of plasma held together by its own gravity. The nearest star to Earth is the Sun. Other stars, mostly in the Milky Way, are visible from Earth during the night, appearing as a multitude of fixed luminous points in the sky due to their immense distance from Earth. Historically, the most prominent stars were grouped into constellations and asterisms, and the brightest stars gained proper names. Extensive catalogues of stars have been assembled by astronomers, which provide standardized star designations.
For at least a portion of its life, a star shines due to thermonuclear fusion of hydrogen into helium in its core, releasing energy that traverses the star's interior and then radiates into outer space. Once the hydrogen in the core of a star is nearly exhausted, almost all naturally occurring elements heavier than helium are created by stellar nucleosynthesis during the star's lifetime and, for some stars, by supernova nucleosynthesis when it explodes. Near the end of its life, a star can also contain degenerate matter. Astronomers can determine the mass, age, metallicity (chemical composition), and many other properties of a star by observing its motion through space, luminosity, and spectrum respectively. The total mass of a star is the principal determinant of its evolution and eventual fate. Other characteristics of a star, including diameter and temperature, change over its life, while the star's environment affects its rotation and movement. A plot of the temperature of many stars against their luminosities, known as a Hertzsprung–Russell diagram (H–R diagram), allows the age and evolutionary state of a star to be determined.
the universe documentary, space documentary, bbc documentary universe, space universe documentary, universe full documentary, universe documentary 2015, universe documentary national geographic, stars documentary,
- published: 31 May 2015
- views: 5
Local Laboratories for high-redshift astrophysics
Speaker: Alaina Henry (GSFC)
Abstract:
The Lyman alpha emission line is an important diagnostic tool, used widely in attempts to understand the properties of galaxies and the intergalactic medium at early cosmic times. With a relative ease of observation at z > 2-3, and the potential to constrain outflows, dust, and neutral gas in the circumgalactic and intergalactic media, Lyman Alpha surveys have grown dramatically in the last decade. However, we are still challenged to predict Lyman alpha emission (or lack thereof); consequently, our ability to interpret high-redshift results is limited. I this talk, I will review some of the key high-redshift observations, and then turn to what we can learn from low-redshift galaxies. I will discuss new results from a sample of low-redshift objects (the z~0.2 "Green Peas") with strong line emission and low metallicity. Using UV spectroscopy from HST/COS, I will test prevailing theories of Lyman alpha escape, including resonant scattering in an outflow, and the geometry of neutral gas. In fact, the Green Pea galaxies are useful local laboratories for astrophysics beyond Lyman alpha output. Looking forward, I will discuss some of the ways that these (or similar) objects can serve as local laboratories for other astrophysics, including gas-phase abundance diagnostics.
wn.com/Local Laboratories For High Redshift Astrophysics
Speaker: Alaina Henry (GSFC)
Abstract:
The Lyman alpha emission line is an important diagnostic tool, used widely in attempts to understand the properties of galaxies and the intergalactic medium at early cosmic times. With a relative ease of observation at z > 2-3, and the potential to constrain outflows, dust, and neutral gas in the circumgalactic and intergalactic media, Lyman Alpha surveys have grown dramatically in the last decade. However, we are still challenged to predict Lyman alpha emission (or lack thereof); consequently, our ability to interpret high-redshift results is limited. I this talk, I will review some of the key high-redshift observations, and then turn to what we can learn from low-redshift galaxies. I will discuss new results from a sample of low-redshift objects (the z~0.2 "Green Peas") with strong line emission and low metallicity. Using UV spectroscopy from HST/COS, I will test prevailing theories of Lyman alpha escape, including resonant scattering in an outflow, and the geometry of neutral gas. In fact, the Green Pea galaxies are useful local laboratories for astrophysics beyond Lyman alpha output. Looking forward, I will discuss some of the ways that these (or similar) objects can serve as local laboratories for other astrophysics, including gas-phase abundance diagnostics.
- published: 28 Aug 2015
- views: 21
6. Microlensing, Astrometry and Other Methods
Frontiers/Controversies in Astrophysics (ASTR 160) The class begins with a discussion on transits important astronomical events that help astronomers to find...
wn.com/6. Microlensing, Astrometry And Other Methods
Frontiers/Controversies in Astrophysics (ASTR 160) The class begins with a discussion on transits important astronomical events that help astronomers to find...
- published: 29 Sep 2008
- views: 10531
-
author:
YaleCourses
Documentary on Stars HD
A star is a massive, luminous sphere of plasma held together by its own gravity. The nearest star to Earth is the Sun, which is the source of most of the planet's energy. Other stars are visible from Earth during the night, appearing as a multitude of fixed luminous points due to their immense distance. Historically, the most prominent stars were grouped into constellations and asterisms, and the brightest stars gained proper names. Extensive catalogues of stars have been assembled by astronomers, which provide standardized star designations.
For at least a portion of its life, a star shines due to thermonuclear fusion of hydrogen into helium in its core, releasing energy that traverses the star's interior and then radiates into outer space. Once the hydrogen in the core of a star is nearly exhausted, almost all naturally occurring elements heavier than helium are created by stellar nucleosynthesis during the star's lifetime and, for some stars, by supernova nucleosynthesis when it explodes. Near the end of its life, a star can also contain degenerate matter. Astronomers can determine the mass, age, metallicity (chemical composition), and many other properties of a star by observing its motion through space, luminosity, and spectrum respectively. The total mass of a star is the principal determinant of its evolution and eventual fate. Other characteristics of a star, including diameter and temperature, change over its life, while the star's environment affects its rotation and movement. A plot of the temperature of many stars against their luminosities, known as a Hertzsprung–Russell diagram (H–R diagram), allows the age and evolutionary state of a star to be determined.
A star's life begins with the gravitational collapse of a gaseous nebula of material composed primarily of hydrogen, along with helium and trace amounts of heavier elements. Once the stellar core is sufficiently dense, hydrogen becomes steadily converted into helium through nuclear fusion, releasing energy in the process. The remainder of the star's interior carries energy away from the core through a combination of radiative and convective processes. The star's internal pressure prevents it from collapsing further under its own gravity. Once the hydrogen fuel at the core is exhausted, a star with at least 0.4 times the mass of the Sun expands to become a red giant, in some cases fusing heavier elements at the core or in shells around the core. The star then evolves into a degenerate form, recycling a portion of its matter into the interstellar environment, where it will contribute to the formation of a new generation of stars with a higher proportion of heavy elements. Meanwhile, the core becomes a stellar remnant: a white dwarf, a neutron star, or (if it is sufficiently massive) a black hole.
Binary and multi-star systems consist of two or more stars that are gravitationally bound, and generally move around each other in stable orbits. When two such stars have a relatively close orbit, their gravitational interaction can have a significant impact on their evolution. Stars can form part of a much larger gravitationally bound structure, such as a star cluster or a galaxy.
wn.com/Documentary On Stars Hd
A star is a massive, luminous sphere of plasma held together by its own gravity. The nearest star to Earth is the Sun, which is the source of most of the planet's energy. Other stars are visible from Earth during the night, appearing as a multitude of fixed luminous points due to their immense distance. Historically, the most prominent stars were grouped into constellations and asterisms, and the brightest stars gained proper names. Extensive catalogues of stars have been assembled by astronomers, which provide standardized star designations.
For at least a portion of its life, a star shines due to thermonuclear fusion of hydrogen into helium in its core, releasing energy that traverses the star's interior and then radiates into outer space. Once the hydrogen in the core of a star is nearly exhausted, almost all naturally occurring elements heavier than helium are created by stellar nucleosynthesis during the star's lifetime and, for some stars, by supernova nucleosynthesis when it explodes. Near the end of its life, a star can also contain degenerate matter. Astronomers can determine the mass, age, metallicity (chemical composition), and many other properties of a star by observing its motion through space, luminosity, and spectrum respectively. The total mass of a star is the principal determinant of its evolution and eventual fate. Other characteristics of a star, including diameter and temperature, change over its life, while the star's environment affects its rotation and movement. A plot of the temperature of many stars against their luminosities, known as a Hertzsprung–Russell diagram (H–R diagram), allows the age and evolutionary state of a star to be determined.
A star's life begins with the gravitational collapse of a gaseous nebula of material composed primarily of hydrogen, along with helium and trace amounts of heavier elements. Once the stellar core is sufficiently dense, hydrogen becomes steadily converted into helium through nuclear fusion, releasing energy in the process. The remainder of the star's interior carries energy away from the core through a combination of radiative and convective processes. The star's internal pressure prevents it from collapsing further under its own gravity. Once the hydrogen fuel at the core is exhausted, a star with at least 0.4 times the mass of the Sun expands to become a red giant, in some cases fusing heavier elements at the core or in shells around the core. The star then evolves into a degenerate form, recycling a portion of its matter into the interstellar environment, where it will contribute to the formation of a new generation of stars with a higher proportion of heavy elements. Meanwhile, the core becomes a stellar remnant: a white dwarf, a neutron star, or (if it is sufficiently massive) a black hole.
Binary and multi-star systems consist of two or more stars that are gravitationally bound, and generally move around each other in stable orbits. When two such stars have a relatively close orbit, their gravitational interaction can have a significant impact on their evolution. Stars can form part of a much larger gravitationally bound structure, such as a star cluster or a galaxy.
- published: 27 Oct 2014
- views: 0
Tanmoy's Thesis Colloquium
The Diversity and Versatility of Gamma-ray Bursts
Gamma-ray bursts (GRBs) are the most energetic explosions in the Universe, thus providing a unique laboratory for the study of extreme astrophysical processes. In parallel, their large luminosity makes GRBs a premier probe of the early Universe. My thesis has explored and exploited both aspects of GRB science, and in this talk I will highlight the versatility of GRBs through two related studies: i) probing the nature and composition of the relativistic outflows in GRBs through the first multi-wavelength detection and characterization of reverse shocks, and ii) utilizing GRBs to measure the evolution of the galaxy mass-metallicity relation at unprecedented redshifts. I will conclude with a discussion of future directions along both research tracks that take advantage of new and upcoming facilities.
wn.com/Tanmoy's Thesis Colloquium
The Diversity and Versatility of Gamma-ray Bursts
Gamma-ray bursts (GRBs) are the most energetic explosions in the Universe, thus providing a unique laboratory for the study of extreme astrophysical processes. In parallel, their large luminosity makes GRBs a premier probe of the early Universe. My thesis has explored and exploited both aspects of GRB science, and in this talk I will highlight the versatility of GRBs through two related studies: i) probing the nature and composition of the relativistic outflows in GRBs through the first multi-wavelength detection and characterization of reverse shocks, and ii) utilizing GRBs to measure the evolution of the galaxy mass-metallicity relation at unprecedented redshifts. I will conclude with a discussion of future directions along both research tracks that take advantage of new and upcoming facilities.
- published: 29 Apr 2015
- views: 157
CoRoT3-KASC7 #02 - J. Montalban - Ensemble asteroseismology, clusters, and scaling laws
Conference given during The Space photometry Revolution, CoRoT Symposium 3, Kepler KASC-7 joint meeting (6-11 Jul 2014, Toulouse, France)
http://corot3-kasc7.sciencesconf.org/
Session: 1 - Probing stellar structure and evolution with asteroseismology
Date: July 7, 2014
Title: Ensemble asteroseismology, clusters, and scaling laws
Speaker: Josefina Montalban
Abstract: The detection of radial and non-radial solar-like oscillations in thousands of G-K giants with CoRoT and Kepler has provided surprising results with a great and unexpected impact on other astrophysical domains. The available global seismic parameters allow, via scaling relations, largely model-independent determinations of stellar radii and masses, and can be used to estimate distances and ages of thousands of stars in different regions of the Galaxy . The ability of asteroseismology to characterize large populations of stars has called for a large scientific collaboration between expert researchers in galactic evolution, stellar structure , asteroseismology, stellar population synthesis, and spectroscopists. The collaboration between space seismic surveys and extensive ground-based spectroscopic surveys such as APOGEE, HERMES-GALAH and GESS is specially promising. That will allow the determination of precise age-metallicity and age-velocity relationships as well as information on metallicity gradients in the Galactic disc, all of them crucial ingredients for the study of the formation and evolution of the Galaxy. However, to successfully exploit all these data, a thorough knowledge of the uncertainties and systematic of the seismic determination of global stellar parameters is mandatory. In addition to the studies based on seismic analysis of theoretical stellar models and seismic analysis of independently characterized stars, the seismic study of stars belonging to open clusters can provide an particularly interesting test of the accuracy of seismically derived masses, radii, and ages
wn.com/Corot3 Kasc7 02 J. Montalban Ensemble Asteroseismology, Clusters, And Scaling Laws
Conference given during The Space photometry Revolution, CoRoT Symposium 3, Kepler KASC-7 joint meeting (6-11 Jul 2014, Toulouse, France)
http://corot3-kasc7.sciencesconf.org/
Session: 1 - Probing stellar structure and evolution with asteroseismology
Date: July 7, 2014
Title: Ensemble asteroseismology, clusters, and scaling laws
Speaker: Josefina Montalban
Abstract: The detection of radial and non-radial solar-like oscillations in thousands of G-K giants with CoRoT and Kepler has provided surprising results with a great and unexpected impact on other astrophysical domains. The available global seismic parameters allow, via scaling relations, largely model-independent determinations of stellar radii and masses, and can be used to estimate distances and ages of thousands of stars in different regions of the Galaxy . The ability of asteroseismology to characterize large populations of stars has called for a large scientific collaboration between expert researchers in galactic evolution, stellar structure , asteroseismology, stellar population synthesis, and spectroscopists. The collaboration between space seismic surveys and extensive ground-based spectroscopic surveys such as APOGEE, HERMES-GALAH and GESS is specially promising. That will allow the determination of precise age-metallicity and age-velocity relationships as well as information on metallicity gradients in the Galactic disc, all of them crucial ingredients for the study of the formation and evolution of the Galaxy. However, to successfully exploit all these data, a thorough knowledge of the uncertainties and systematic of the seismic determination of global stellar parameters is mandatory. In addition to the studies based on seismic analysis of theoretical stellar models and seismic analysis of independently characterized stars, the seismic study of stars belonging to open clusters can provide an particularly interesting test of the accuracy of seismically derived masses, radii, and ages
- published: 21 Oct 2014
- views: 2
They Come From The Fiery Heart Of The Cosmos - Heavy Metals Documentary - National TV
They Come From The Fiery Heart Of The Cosmos - Heavy Metals Documentary - Films
A metal is a product (a component, substance, or blend) that is commonly tough, opaque, shiny, and also has great electrical as well as thermal conductivity. Metals are normally malleable-- that is, they can be hammered or pressed completely unfit without breaking or cracking-- along with fusible (able to be merged or melted) as well as ductile (able to be extended into a thin cable). [3] Regarding 91 of the 118 elements in the periodic table of elements are metals (some components appear in both metallic as well as non-metallic forms).
The meaning of "steel" varies for numerous communities. As an example, astronomers use the blanket term "metal" for benefit to jointly describe all elements apart from hydrogen and helium (the primary components of superstars, which in turn form a lot of the noticeable concern in the universe). Thus, in astronomy and bodily cosmology, the metallicity of an item is the percentage of its issue composed of chemical aspects other than hydrogen as well as helium. [4] Additionally, numerous elements and also substances that are not typically classified as steels come to be metallic under pushy; these are formed as metal allotropes of non-metals.
The atoms of metal materials are carefully positioned to surrounding atoms in one of two common arrangements. The first arrangement is referred to as body-centered cubic. In this plan, each atom is positioned at the facility of eight others. The other is known as face-centered cubic. In this setup, each atom is positioned in the center of 6 others. The continuous plan of atoms in these frameworks develops a crystal. Some steels take on both structures relying on the temperature. [5]
Atoms of metals readily lose their outer shell electrons, resulting in a cost-free streaming cloud of electrons within their or else solid arrangement. This gives the capacity of metal materials to quickly transmit heat and also electrical energy. While this circulation of electrons occurs, the solid characteristic of the metal is produced by electrostatic interactions between each atom and the electron cloud. This type of bond is called a metallic bond.
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wn.com/They Come From The Fiery Heart Of The Cosmos Heavy Metals Documentary National Tv
They Come From The Fiery Heart Of The Cosmos - Heavy Metals Documentary - Films
A metal is a product (a component, substance, or blend) that is commonly tough, opaque, shiny, and also has great electrical as well as thermal conductivity. Metals are normally malleable-- that is, they can be hammered or pressed completely unfit without breaking or cracking-- along with fusible (able to be merged or melted) as well as ductile (able to be extended into a thin cable). [3] Regarding 91 of the 118 elements in the periodic table of elements are metals (some components appear in both metallic as well as non-metallic forms).
The meaning of "steel" varies for numerous communities. As an example, astronomers use the blanket term "metal" for benefit to jointly describe all elements apart from hydrogen and helium (the primary components of superstars, which in turn form a lot of the noticeable concern in the universe). Thus, in astronomy and bodily cosmology, the metallicity of an item is the percentage of its issue composed of chemical aspects other than hydrogen as well as helium. [4] Additionally, numerous elements and also substances that are not typically classified as steels come to be metallic under pushy; these are formed as metal allotropes of non-metals.
The atoms of metal materials are carefully positioned to surrounding atoms in one of two common arrangements. The first arrangement is referred to as body-centered cubic. In this plan, each atom is positioned at the facility of eight others. The other is known as face-centered cubic. In this setup, each atom is positioned in the center of 6 others. The continuous plan of atoms in these frameworks develops a crystal. Some steels take on both structures relying on the temperature. [5]
Atoms of metals readily lose their outer shell electrons, resulting in a cost-free streaming cloud of electrons within their or else solid arrangement. This gives the capacity of metal materials to quickly transmit heat and also electrical energy. While this circulation of electrons occurs, the solid characteristic of the metal is produced by electrostatic interactions between each atom and the electron cloud. This type of bond is called a metallic bond.
More Documentary Films:
http://thetrendstoday.com
Be The First To Watch Our Newly Uploaded Films
Just By Subscribing To Our Channel
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- published: 12 Aug 2015
- views: 1
CASS Seminar 11 December 2013: Evan Kirby (UCI)
Dwarf Galaxies: The Nexus of Dark Matter and Chemical Evolution The Local Group's dwarf galaxies are near enough for exquisitely detailed, resolved stellar spectroscopy and diverse enough...
wn.com/Cass Seminar 11 December 2013 Evan Kirby (Uci)
Dwarf Galaxies: The Nexus of Dark Matter and Chemical Evolution The Local Group's dwarf galaxies are near enough for exquisitely detailed, resolved stellar spectroscopy and diverse enough...
CASS Seminar 2 April 2014: Tucker Jones (UCSB)
Bigger and brighter: detailed properties of gravitationally lensed galaxies Gravitational lensing is a powerful tool for studying the formation of galaxies in the early universe. I will present...
wn.com/Cass Seminar 2 April 2014 Tucker Jones (Ucsb)
Bigger and brighter: detailed properties of gravitationally lensed galaxies Gravitational lensing is a powerful tool for studying the formation of galaxies in the early universe. I will present...
CoRoT3-KASC7 #15 - M. Havel - An homogeneous study of 400 exoplanets with CEPAM
Conference given during The Space photometry Revolution, CoRoT Symposium 3, Kepler KASC-7 joint meeting (6-11 Jul 2014, Toulouse, France)
http://corot3-kasc7.sciencesconf.org/
Session: 2 - Extrasolar planets and planet systems
Date: July 8, 2014
Title: An homogeneous study of 400 exoplanets with CEPAM: evolution and compositions
Speaker: Mathieu Havel
Abstract: The discovery of more than 400 hundred giant exoplanets transiting in front of their parent star allows detailed studies of a statistically significant sample of stars and planets. Using the tools developed to constrain the properties of the CoRoT stars and planets with new equations of state and atmospheric boundary conditions, we calculate homogeneous constraints on the evolutions and compositions of these planets. This allows us to revisit two major problems concerning giant exoplanets: (1) The inflation problem, namely why a large fraction of exoplanets is larger than expected from standard evolution models. (2) The existence of a correlation between the mass of heavy elements present inside exoplanets with the metallicity of their parent stars. We also discuss the future perspectives brought by the PLATO space mission, which should detect ~1 to 3 thousands new transiting giant planets in various configurations with seismological constraints on their parent stars. This additional piece of information should allow further studies of the different correlations between stellar and planetary properties, and improve significantly the precision on their mass, radius and age.
http://corot3-kasc7.sciencesconf.org/33674
wn.com/Corot3 Kasc7 15 M. Havel An Homogeneous Study Of 400 Exoplanets With Cepam
Conference given during The Space photometry Revolution, CoRoT Symposium 3, Kepler KASC-7 joint meeting (6-11 Jul 2014, Toulouse, France)
http://corot3-kasc7.sciencesconf.org/
Session: 2 - Extrasolar planets and planet systems
Date: July 8, 2014
Title: An homogeneous study of 400 exoplanets with CEPAM: evolution and compositions
Speaker: Mathieu Havel
Abstract: The discovery of more than 400 hundred giant exoplanets transiting in front of their parent star allows detailed studies of a statistically significant sample of stars and planets. Using the tools developed to constrain the properties of the CoRoT stars and planets with new equations of state and atmospheric boundary conditions, we calculate homogeneous constraints on the evolutions and compositions of these planets. This allows us to revisit two major problems concerning giant exoplanets: (1) The inflation problem, namely why a large fraction of exoplanets is larger than expected from standard evolution models. (2) The existence of a correlation between the mass of heavy elements present inside exoplanets with the metallicity of their parent stars. We also discuss the future perspectives brought by the PLATO space mission, which should detect ~1 to 3 thousands new transiting giant planets in various configurations with seismological constraints on their parent stars. This additional piece of information should allow further studies of the different correlations between stellar and planetary properties, and improve significantly the precision on their mass, radius and age.
http://corot3-kasc7.sciencesconf.org/33674
- published: 21 Oct 2014
- views: 3
Let's Play 100% Orange Juice with PockyKunoichi & Taco Thief Part 3
Okay so here is the next part. Yup. I'm just going to nonchalantly shove it down your throat with some milk and barbecue sauce. Why that combination you ask? You don't get to ask, you have duct tape on your mouth. You have just now noticed the duct tape on your mouth.
look down.
look back up.
nope still duct tape on your mouth.
I lied. There was never duct tape on your mouth. It was masking tape. DUN DUN DUN. Except it wasn't. There was nothing. You've been in the drugs again haven't you.
What? Don't give me that look. We both know you like dat Fun Dip. MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
Eucalyptus
Okay, I got the real masking tape now. Here you go person's mouth, hope you are nice and cozy now. You will be even more cozy if you rip it off violently. Yup, blood circulation is nice, and so is water.
I'm really fucking bored. This is occupying me a bit though. Rules of Nature another bit. Melting ice too.
You know that this part was the worst when it came to exporting. This time my computer had TWO guns to its monitor. Luckily for me it doesn't have hands, the monitor isn't what it should be aiming at, and the guns are just imaginary.
Seriously though, took forever for my computer to run at normal speed despite the exporting finishing. It's like I was watching a movie, but with no popcorn and a drastically reduced screen. 100/10 Michael bay doesn't have shit on my suicidal computer.
You know, I have come to a realization that a description should be describing things, like the video. So I'm going to provide a description for a part of the video.
A star is a massive, luminous sphere of plasma held together by its own gravity. The nearest star to Earth is the Sun. Other stars, mostly in the Milky Way, are visible from Earth during the night, appearing as a multitude of fixed luminous points due to their immense distance. Historically, the most prominent stars were grouped into constellations and asterisms, and the brightest stars gained proper names. Extensive catalogues of stars have been assembled by astronomers, which provide standardized star designations.
For at least a portion of its life, a star shines due to thermonuclear fusion of hydrogen into helium in its core, releasing energy that traverses the star's interior and then radiates into outer space. Once the hydrogen in the core of a star is nearly exhausted, almost all naturally occurring elements heavier than helium are created by stellar nucleosynthesis during the star's lifetime and, for some stars, by supernova nucleosynthesis when it explodes. Near the end of its life, a star can also contain degenerate matter. Astronomers can determine the mass, age, metallicity (chemical composition), and many other properties of a star by observing its motion through space, luminosity, and spectrum respectively. The total mass of a star is the principal determinant of its evolution and eventual fate. Other characteristics of a star, including diameter and temperature, change over its life, while the star's environment affects its rotation and movement. A plot of the temperature of many stars against their luminosities, known as a Hertzsprung–Russell diagram (H–R diagram), allows the age and evolutionary state of a star to be determined.
- Taken from Wikipedia, Thank you Wikipedia!!!
I would provide some MLA Citation but this isn't school, this is a description. Not as hardcore.
Btw from reading this you should now know that our characters are gods. We are holding hundreds of stars on us like freaking skittles. Taste the radiation!
I have one last message for you guys:
PARTY HARD!
PARTY HARD!
PARTY HARD!
PARTY HARD!
PARTY HARD!
PARTY HARD!
PARTY HARD!
I'm Kawaii bitch OAO
wn.com/Let's Play 100 Orange Juice With Pockykunoichi Taco Thief Part 3
Okay so here is the next part. Yup. I'm just going to nonchalantly shove it down your throat with some milk and barbecue sauce. Why that combination you ask? You don't get to ask, you have duct tape on your mouth. You have just now noticed the duct tape on your mouth.
look down.
look back up.
nope still duct tape on your mouth.
I lied. There was never duct tape on your mouth. It was masking tape. DUN DUN DUN. Except it wasn't. There was nothing. You've been in the drugs again haven't you.
What? Don't give me that look. We both know you like dat Fun Dip. MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
Eucalyptus
Okay, I got the real masking tape now. Here you go person's mouth, hope you are nice and cozy now. You will be even more cozy if you rip it off violently. Yup, blood circulation is nice, and so is water.
I'm really fucking bored. This is occupying me a bit though. Rules of Nature another bit. Melting ice too.
You know that this part was the worst when it came to exporting. This time my computer had TWO guns to its monitor. Luckily for me it doesn't have hands, the monitor isn't what it should be aiming at, and the guns are just imaginary.
Seriously though, took forever for my computer to run at normal speed despite the exporting finishing. It's like I was watching a movie, but with no popcorn and a drastically reduced screen. 100/10 Michael bay doesn't have shit on my suicidal computer.
You know, I have come to a realization that a description should be describing things, like the video. So I'm going to provide a description for a part of the video.
A star is a massive, luminous sphere of plasma held together by its own gravity. The nearest star to Earth is the Sun. Other stars, mostly in the Milky Way, are visible from Earth during the night, appearing as a multitude of fixed luminous points due to their immense distance. Historically, the most prominent stars were grouped into constellations and asterisms, and the brightest stars gained proper names. Extensive catalogues of stars have been assembled by astronomers, which provide standardized star designations.
For at least a portion of its life, a star shines due to thermonuclear fusion of hydrogen into helium in its core, releasing energy that traverses the star's interior and then radiates into outer space. Once the hydrogen in the core of a star is nearly exhausted, almost all naturally occurring elements heavier than helium are created by stellar nucleosynthesis during the star's lifetime and, for some stars, by supernova nucleosynthesis when it explodes. Near the end of its life, a star can also contain degenerate matter. Astronomers can determine the mass, age, metallicity (chemical composition), and many other properties of a star by observing its motion through space, luminosity, and spectrum respectively. The total mass of a star is the principal determinant of its evolution and eventual fate. Other characteristics of a star, including diameter and temperature, change over its life, while the star's environment affects its rotation and movement. A plot of the temperature of many stars against their luminosities, known as a Hertzsprung–Russell diagram (H–R diagram), allows the age and evolutionary state of a star to be determined.
- Taken from Wikipedia, Thank you Wikipedia!!!
I would provide some MLA Citation but this isn't school, this is a description. Not as hardcore.
Btw from reading this you should now know that our characters are gods. We are holding hundreds of stars on us like freaking skittles. Taste the radiation!
I have one last message for you guys:
PARTY HARD!
PARTY HARD!
PARTY HARD!
PARTY HARD!
PARTY HARD!
PARTY HARD!
PARTY HARD!
I'm Kawaii bitch OAO
- published: 14 Jan 2015
- views: 2
TYT Hour - July 21st, 2010
http://www.theyoungturks.com/membership New TYT Facebook Page(!): Subscribe to the FREE Video Podcast on iTunes: http://bit.ly/d0zlmP Follow us on Twitter: h...
wn.com/Tyt Hour July 21St, 2010
http://www.theyoungturks.com/membership New TYT Facebook Page(!): Subscribe to the FREE Video Podcast on iTunes: http://bit.ly/d0zlmP Follow us on Twitter: h...
Engaging Stakeholders in High School Improvement Efforts
Panelists discuss the important role of stakeholder engagement in high school improvement efforts, including perspectives on community-based supports and wra...
wn.com/Engaging Stakeholders In High School Improvement Efforts
Panelists discuss the important role of stakeholder engagement in high school improvement efforts, including perspectives on community-based supports and wra...