Density of black holes

Black holes are regions of space where the gravity is so high that nothing can escape. Black holes are extremely dense. In fact, if the earth can be crashed and squeezed to size of a marble, it will be dense enough to become a black hole. Edited by Ashraf

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Channels: Astrophysics

Tags: Black Holes Sixty Symbols

Uploaded by: ( Send Message ) on 10-11-2010.

Duration: 6m 37s