- published: 30 Sep 2016
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Astronomy, a natural science, is the study of celestial objects (such as stars, galaxies, planets, moons, asteroids, comets and nebulae) and processes (such as supernovae explosions, gamma ray bursts, and cosmic microwave background radiation), the physics, chemistry, and evolution of such objects and processes, and more generally all phenomena that originate outside the atmosphere of Earth. A related but distinct subject, physical cosmology, is concerned with studying the Universe as a whole.
Astronomy is one of the oldest sciences. The early civilizations in recorded history, such as the Babylonians, Greeks, Indians, Egyptians, Nubians, Iranians, Chinese, and Maya performed methodical observations of the night sky. However, the invention of the telescope was required before astronomy was able to develop into a modern science. Historically, astronomy has included disciplines as diverse as astrometry, celestial navigation, observational astronomy and the making of calendars, but professional astronomy is nowadays often considered to be synonymous with astrophysics.
Space travel can refer to:
Space exploration is the ongoing discovery and exploration of celestial structures in outer space by means of continuously evolving and growing space technology. While the study of space is carried out mainly by astronomers with telescopes, the physical exploration of space is conducted both by unmanned robotic probes and human spaceflight.
While the observation of objects in space, known as astronomy, predates reliable recorded history, it was the development of large and relatively efficient rockets during the early 20th century that allowed physical space exploration to become a reality. Common rationales for exploring space include advancing scientific research, national prestige, uniting different nations, ensuring the future survival of humanity, and developing military and strategic advantages against other countries.
Space exploration has often been used as a proxy competition for geopolitical rivalries such as the Cold War. The early era of space exploration was driven by a "Space Race" between the Soviet Union and the United States. The launch of the first human-made object to orbit Earth, the Soviet Union's Sputnik 1, on 4 October 1957, and the first Moon landing by the American Apollo 11 mission on 20 July 1969 are often taken as landmarks for this initial period. The Soviet space program achieved many of the first milestones, including the first living being in orbit in 1957, the first human spaceflight (Yuri Gagarin aboard Vostok 1) in 1961, the first spacewalk (by Aleksei Leonov) on 18 March 1965, the first automatic landing on another celestial body in 1966, and the launch of the first space station (Salyut 1) in 1971.
The Universe is all of time and space and its contents. The Universe includes planets, stars, galaxies, the contents of intergalactic space, the smallest subatomic particles, and all matter and energy. The observable universe is about 28 billion parsecs (91 billion light-years) in diameter at the present time. The size of the whole Universe is not known and may be either finite or infinite. Observations and the development of physical theories have led to inferences about the composition and evolution of the Universe.
Deep Space may refer to:
Welcome to the first episode of Crash Course Astronomy. Your host for this intergalactic adventure is the Bad Astronomer himself, Phil Plait. We begin with answering a question: "What is astronomy?" -- Table of Contents: What is Astronomy? 3:00 Who Studies Astronomy? 3:50 Origins & Developments 6:52 -- PBS Digital Studios: http://youtube.com/pbsdigitalstudios Follow Phil on Twitter: https://twitter.com/badastronomer Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support CrashCourse on Subbable: http://subbable.com/crashcourse -- Photos: http://commons.wikimedia.org/wiki/File:Earth_cutaway.png http://en.wikipedia.org/wiki/Earth%27s_m...
The Storytelling of Science ( Dawkins, Krauss, deGrasse Tyson, Bill Nye, Brian Greene ) : https://www.youtube.com/watch?v=R_j5jf2MnVg ~ " WHAT COUNTRY IS THIS?? " Basically a stand up comedy! At the University of Washington 5/12/2011 Video is for Educational purposes and posted under terms of Fair Use.
On September 14th, 2015, a ripple in the fabric of space, created by the violent collision of two distant black holes over a billion years ago, washed across the Earth. As it did, two laser-based detectors, 50 years in the making – one in Louisiana and the other in Washington State – momentarily twitched, confirming a century-old prediction by Albert Einstein and marking the opening of a new era in astronomy. Join some of the very scientists responsible for this most anticipated discovery of our age and see how gravitational waves will be used to explore the universe like never before. This program will feature exclusive footage from director Les Guthman’s upcoming documentary chronicling the drama of the gravitational waves discovery. Subscribe to our YouTube Channel for all the latest ...
Like me on Facebook: https://www.facebook.com/DocumentaryKing/ Follow me on twitter: https://twitter.com/DocumentaryKin1 This documentary was made, produced and is completely owned by Discovery Channel. I do not own anything in this video. This video is only for educational purposes and I am not claiming this video as my own in any way.
This HD dramatic video choreographed to powerful music introduces the viewer/student to the wonders of Astronomy. It is designed as a "trailer" to be shown in classrooms by Earth Science and Astronomy teachers in High School and college as a visual "Introduction" to the magic of the cosmos. Please rate this video and feel free to comment. If you like it, please help me spread the word by posting links on your media websites. The more students who can enjoy these dramatic videos, the better! To view all of my videos in Biology, Earth Science, and Astronomy, subscribe to my channel at: http://www.youtube.com/user/sfgregs?feature=mhum. I will be releasing new videos periodically. You can download all of my videos for free from Vimeo, my other video site. The link is available in the "A...
Song: Metallica - Astronomy (Original by Blue Öyster Cult) Album: Garage Inc (1998) A great song proformed by Metallica. Never been played live before, but should be. As Requested, here are the Lyrics... Clock strikes twelve and moondrops burst Out at you from their hiding place Like acid and oil on a madman's face His reason tends to fly away Like lesser birds on the four winds Like silver scrapes in May And now the sand's become a crust Most of you have gone away Come Susie dear, let's take a walk Just out there upon the beach I know you'll soon be married And you'll want to know where winds come from Well it's never said at all On the map that Carrie reads Behind the clock back there you know At the Four Winds Bar Hey! Hey! Hey! Hey! Fou...
Bringing you the BEST Space and Astronomy videos online. Showcasing videos and images from the likes of NASA,ESA,Hubble etc. Join me on Facebook: https://www.facebook.com/spaceisamazing Twitter: https://twitter.com/AmazingSpace2 Google+ : http://goo.gl/1WCBn9 The International Astronomical Union's book and movie celebrating the 400th anniversary of the telescope. The Eyes on the Skies movie explores the many facets of the telescope — the historical development, the scientific importance, the technological breakthroughs, and also the people behind this ground-breaking invention, their triumphs and failures... The Eyes on the Skies movie is presented by Dr. J aka Dr. Joe Liske from ESO, host of the Hubblecast video podcast. It runs for 60 minutes. The material is released under a Crea...
What is the biggest star in the Universe ✶ Astronomy Space Documentary 2016 Look up at the night sky and it is filled with stars. But only a microscopic fraction are visible to the naked eye. In fact, there are estimated to be 100 billion stars in 10,000 billion galaxies in the visible universe. This means that there are roughly 1024 stars out there. These spectacular powerhouses come in an array of different colours and sizes – and many make our own Sun look like a mere pipsqueak. But which is the true giant of the heavens? Well, we have to start by defining what we mean by giant? Is it the one with the largest radius, for example, or the greatest mass? ➤ Subcribe now: https://goo.gl/ECRZqM Thanks for watching!
Space travel : Deep Space Exploration | Astronomy 2016 Space travel : Deep Space Exploration | Astronomy 2016
All I know is that this falling star will die
For a moment light the sky and lead me home
I don't know why this task has been so hard
We've spent out time apart but not alone
This is what I have been given I hope that you can
I hope that you can understand there are reasons beyond ours
The creator holds the stars up in the sky
But you are by far bright and shining star in the sky tonight
This is what I have been given the hardest part is living
With leaving you alone
This is what I have been given the hardest part is living
With leaving you alone
Alone alone, we're not alone
Alone alone, we're not alone
Just like all the rest of them I can't bring you down
You're a million miles from here
But you are by far the brightest shining star in the sky tonight
This is what I have been given the hardest part is living