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Black Holes - College Essays

Black Holes


On December 3, 1995, astronomers using the Hubble Space Telescope identified a black hole in the galaxy NGC 4621, located 100 million light-years from Earth in the direction of the constellation Virgo.
This is the second super-massive black hole that astronomers using the Hubble Space Telescope have found. Astronomers believe that the mass of this black hole is about 1.2 billion times the mass of our sun, but it is concentrated in a space that is not any bigger than our solar system There are two puzzling questions that astronomers are trying to answer. The black hole is fueled by the galaxy and its 800 light-year-wide spiral disk of dust. Before the discovery of this black hole, ...

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the black hole at the center of the galaxy? According to images from the Hubble Space Telescope, the black hole is 20 light-years from the center of the galaxy, but since the black hole is so massive it is hard to explain how it could have been moved. One idea is that the black hole is moving itself. Some astronomers think that the disk of dust serves as a "fuel tank." The black hole sucks in the material which is absorbed by gravity, compressed, and heated to tens of millions of degrees. This theory would explain why radio telescopes have observed radio jets, or hot gas exhausts from the black hole's area. The exhaust may be pushing the black hole across space, as a jet engine gives thrust to a plane.
According to Ted Bunn, an astronomer at Berkley University, "A black hole is a region of space that has so much mass concentrated in it that there is no way for a nearby object to escape its gravitational pull, not even light."

So, what does that mean? The following example ...

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PAPER DETAILS
Added: 5/27/2008 03:54:46 PM
Category: Science & Nature
Type: Premium Paper
Words: 806
Pages: 3

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