Ranked #1
High Mass Evolved Stars
High Mass Evolved Stars
Transcript: Evolved massive stars have sufficient pressure and gravity that the temperatures in their cores can cause he... Read more
25 Jul 2011
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1min
Ranked #2
Speculation About Black Holes
Speculation About Black Holes
Transcript: The exotic nature of black holes encourages speculation. Could anyone survive a journey into a black hole? ... Read more
25 Jul 2011
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1min
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Ranked #3
Detecting Black Holes
Detecting Black Holes
Transcript: If black holes are totally dark, how can they possibly be detected? A black hole that was isolated in space... Read more
25 Jul 2011
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1min
Ranked #4
Environment of a Black Hole
Environment of a Black Hole
Transcript: Contrary to common belief, black holes are not vacuum cleaners that suck up everything in sight. If the Sun... Read more
25 Jul 2011
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1min
Ranked #5
Properties of Black Holes
Properties of Black Holes
Transcript: Black holes have few observable properties; after all, there’s nothing to see. Mass is a fundamental proper... Read more
25 Jul 2011
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1min
Ranked #6
Schwarzchild Radius
Schwarzchild Radius
Transcript: The radius corresponding to the event horizon is called the Schwarzschild radius after the first theorist wh... Read more
25 Jul 2011
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1min
Ranked #7
Event Horizon
Event Horizon
Transcript: The event horizon is the imaginary surface of a black hole, the region from within which no object, no parti... Read more
25 Jul 2011
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Ranked #8
Black Holes
Black Holes
Transcript: Black holes can only properly be understood in terms of Einstein’s Theory of General Relativity, but specula... Read more
25 Jul 2011
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Ranked #9
Pulsars
Pulsars
Transcript: In 1967 Jocelyn Bell, a graduate student working at a radio telescope in Cambridge, England, noticed an unex... Read more
25 Jul 2011
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1min
Ranked #10
Neutron Star
Neutron Star
Transcript: In 1934 American astronomers Walter Baade and Fritz Zwicky speculated that the result of a supernova explosi... Read more
25 Jul 2011
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1min
Ranked #11
Cycle of Star Birth and Death
Cycle of Star Birth and Death
Transcript: Supernovae are key players in the cycle of star birth and death. Supernovae recycle elements into the mediu... Read more
25 Jul 2011
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Ranked #12
Supernova 1987 A
Supernova 1987 A
Transcript: On February 23, 1987, Oscar du Halde stepped outside his telescope to check the sky conditions at the Las Co... Read more
25 Jul 2011
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1min
Ranked #13
Supernova
Supernova
Transcript: A supernova is the violently explosive death of a star with the corresponding release of radiant energy, a f... Read more
25 Jul 2011
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1min
Ranked #14
White Dwarfs
White Dwarfs
Transcript: In 1844 German astronomer Friedrich Bessel studied the motions of Sirius, the brightest star in the sky, and... Read more
25 Jul 2011
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Ranked #15
The Heaviest Elements
The Heaviest Elements
Transcript: The heaviest elements are fantastically rare compared to hydrogen and helium because they can only be produc... Read more
25 Jul 2011
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1min