SUBSCRIBE FOR MORE DOCUMENTARY FILMS HD UPDATES:
http://www.youtube.com/subscription_center?add_user=worlddocumentarych
A black
hole is a region of spacetime from which gravity prevents anything, including light, from escaping. The theory of general relativity predicts that a sufficiently compact mass will deform spacetime to form a black hole. The boundary of the region from which no escape is possible is called the event horizon. Although crossing the event horizon has enormous effect on the fate of the object crossing it, it appears to have no locally detectable features. In many ways a black hole acts like an ideal black body, as it reflects no light. Moreover, quantum field theory in curved spacetime predicts that event horizons emit
Hawking radiation, with the same spectrum as a black body of a temperature inversely proportional to its mass. This temperature is on the order of billionths of a kelvin for black holes of stellar mass, making it all but impossible to observe.
Objects whose gravitational fields are too strong for light to escape were first considered in the
18th century by
John Michell and
Pierre-Simon Laplace. The first modern solution of general relativity that would characterize a black hole was found by
Karl Schwarzschild in
1916, although its interpretation as a region of space from which nothing can escape was first published by
David Finkelstein in
1958.
Long considered a mathematical curiosity, it was during the
1960s that theoretical work showed black holes were a generic prediction of general relativity.
The discovery of neutron stars sparked interest in gravitationally collapsed compact objects as a possible astrophysical reality.
WILD LIFE DOCUMENTARIES - https://www.youtube.com/playlist?list=PL89NZer-bHII0dQDT30T4lN6qGy8f3Ndm
RELIGION DOCUMENTARY - https://www.youtube.com/playlist?list=PL89NZer-bHIIApKOXifEvgHoQxXeoewaR
HISTORY DOCUMENTARY - https://www.youtube.com/playlist?list=PL89NZer-bHIIFtbbgSotwgkwCduxG1YlK
ADVENTURE DOCUMENTARY - https://www.youtube.com/playlist?list=PL89NZer-bHIJ_fsqbIakXabFf44jPBm-E
HEALTH AND MEDICINE DOCUMENTARY - https://www.youtube.com/playlist?list=PL89NZer-bHILBMJN0wvBfAsDVXzz0GEIH
PEOPLE DOCUMENTARY - https://www.youtube.com/playlist?list=PL89NZer-bHILcEazOCor7wbrXTIn3gNkX
TECHNOLOGY DOCUMENTARY - https://www.youtube.com/playlist?list=PL89NZer-bHIK8tVs-9jdosdco5hbQQl6n
SUPERNATURAL DOCUMENTARY - https://www.youtube.com/playlist?list=PL89NZer-bHIIraIeCulhClPA004pED-Vg
Follow us :
http://worldgeographicchannel.blogspot.com/
http://worlddocumentarychannel.blogspot.com/
http://documentarychannelhd.blogspot.com/
http://amazingdocumentaryfilms.blogspot.com/
http://topamazingdocumentaries.blogspot.com/
http://bestdocumentarychannel.blogspot.com/
http://top-documentaryfilms.blogspot.com/
Tags:
documentary film,
free documentary movies online,
watch full movies online,
documentary,
science documentary,
free documentary movies,
watch free documentaries,
free online documentary,
film free online watch,
free documentaries online,
music documentaries,
documentaries,
video documentaries,
free movie watch,
watch the movie,
online free movie,
film making,
short film making,
make music videos,
best documentary,
top documentary,
best documentaries,
best documentary film,
best documentary films,
2014 best documentary,
2014 best documentary film,
2014 best documentary films,
2014 best documentaries,
watch 2014 best documentary,
watch 2014 best documentary films,
watch 2014 best documentaries,
top documentary films,
top documentaries,
2014 top documentary,
2014 top documentary film,
2014 top documentary films
2014 top documentaries,
documentary online,
documentaries online,
monster of the cosmos,
black holes,
- published: 09 Dec 2014
- views: 5643