An object that has a gravitational field that light can not escape.
What would it be like to visit a black hole?
It would be interesting: http://www.youtube.com/watch?
Do black holes really exist?
Almost certainly.
What causes gamma ray bursts?
A collapsing star.
What is in the center of the milky way?
A massive black hole.
What is the mass of the object in the center of our galaxy?
It is on the order of 4 million solar masses.
Who was John Michell?
An English geologist and philosopher.
Who was Pierre-Simon Laplace?
A French mathematician and astronomer.
Who was Karl Schwarzschild?
A German physicist.
What is the Schwarzschild radius of Earth?
8.869 mm.
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