24 JAN 2015 by ideonexus
A Black Hole is a Star Forever Falling Inward
He talked to us about the new theory of black holes which he had then just worked out. The idea of a black hole was one of the most dramatic consequences of Einstein's theory of gravity. According to Einstein's equations, a massive star at the end of its life, when it has exhausted its nuclear fuel, continues to contract and grow smaller and denser under the influence of its own gravitation. After the nuclear fuel is used up, the star goes into a state of gravitational collapse. All parts of ... 1 
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notes24 JAN 2015 by ideonexus
A Black Hole is a Star Forever Falling Inward
He talked to us about the new theory of black holes which he had then just worked out. The idea of a black hole was one of the most dramatic consequences of Einsteins theory of gravity. According to Einstein's equations, a massive star at the end of its life, when it has exhausted its nuclear fuel, continues to contract and grow smaller and denser under the influence of its own gravitation. After the nuclear fuel is used up, the star goes into a state of gravitational collapse. All parts of t...24 JAN 2015 by ideonexus
A Black Hole is a Star Forever Falling Inward
He talked to us about the new theory of black holes which he had then just worked out. The idea of a black hole was one of the most dramatic consequences of Einstein's theory of gravity. According to Einstein's equations, a massive star at the end of its life, when it has exhausted its nuclear fuel, continues to contract and grow smaller and denser under the influence of its own gravitation. After the nuclear fuel is used up, the star goes into a state of gravitational collapse. All parts of ...22 MAR 2012 by ideonexus
The Enterprise's Impulse Drive
Moving back to the sub-light-speed world: We are not through with Einstein yet. His famous relation between
mass and energy, E=mc 2 , which is a consequence of special relativity, presents a further challenge to space travel at impulse speeds. As I have described it in chapter 1, a rocket is a device that propels material backward in order to move forward. As you might imagine, the faster the material is propelled backward, the larger will be the forward impulse the rocket will receive. Mater... 1 notes
notesThe ship uses hydrogen fusion to propel helium atoms at near the speed of light, but this hypothetical form of propulsion would require incredible amounts of hydrogen to work.
