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Black Holes
Beginning of essay
Black Hole, a theoretical concept in the study of gravitation. The
gravitational field of a black hole, which is an extremely dense body, is
so strong that, if the body is large enough, nothing, including
electromagnetic radiation, can escape from its vicinity. The body is
surrounded by a spheric ....
Middle of essay
....her densities. Two new types of pressure arise at densities a
million and a million billion times that of water, respectively, and a
compact white dwarf or a neutron star may form. If the core mass exceeds
about 1. 7 solar masses, however, neither electron nor neutron pressure is
sufficient to prevent collapse to a black hole.
Astronomers have discovered X-ray emissions from a binary star
system, Cygnus X-1, in which the primary is a normal star of about 30 solar
masses. Doppler shift.... |
| Number of words: 688 |
Approximate pages: 3 |
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