Black Holes
A black hole is a region of space from which nothing, not even light, can escape. It is the result of the deformation of spacetime caused by a very compact mass. Around a black hole there is an undetectable surface which marks the point of no return, called an event horizon. It is called "black" because it absorbs all the light that hits it, reflecting nothing, just like a perfect black body in thermodynamics. Quantum mechanics predicts that black holes also emit radiation like a black body with a finite temperature. This temperature decreases with the mass of the black hole, making it unlikely to observe this radiation for black holes of stellar mass. (from wikipedia.org)
Space - Black Holes
This episode looks at the destructive force of Black Holes.
Stephen Hawking's Universe - Black Holes and Beyond
Are black holes real? This episode is about the discover of black holes and beyond: Ultraluminous quasars and supermassive black holes, wormholes, and singularities.
Through the Wormhole - The Riddle of Black Holes
They are the most powerful objects in the universe. Nothing, not even light, can escape the gravitational pull of a black hole.
Supermassive Black Holes
A supermassive black hole is a black hole with a mass in the range of hundreds of thousands to tens of billions of solar masses. Scientists now think supermassive black holes are a fundamental part of what a galaxy actually is.
Who's afraid of a big black hole?
Black holes are one of the most destructive forces in the universe, capable of tearing a planet apart and swallowing an entire star. Yet scientists now believe they could hold the key to answering the ultimate question - what was there before the Big Bang?
The Universe: Cosmic Holes
This program looks at the mysteries of black holes and theories about the existence of other kinds of holes such as white holes and wormholes.
| Web... | Cosmic Journeys Cosmic Journeys consists of fourteen episodes which explore the cutting-edge stories about the origins of the universe, black holes, exploding stars, the search for ET life, and the nature of the planets. www.infocobuild.com/books-and-films/science/cosmic-journeys.html |