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建立人际资源圈Black_Holes
2013-11-13 来源: 类别: 更多范文
Black Holes
The universe as we know it is an amazing thing. There is so much we have learned, but there is even more that we have yet to understand. One of the great mysteries of the universe is the black hole. While most people are not really sure of what they are, some think that they are a magical gateway into another galaxy or another part of our universe. The mystery surrounding the black hole is what made me interested in them.
The first scientists to study black holes and the collapsing of stars were Robert Oppenhimer and his student Hartland Snyder, early in the nineteen hundreds. They came up with the name black hole because of the fact that not even light could escape their gravitational pull. The second part, hole, is due to the actual hole where everything is absorbed and where the center core is found.
Since all black holes are created from the collapse of a star, one must know a little bit about how a star is formed. A star is created when huge gas clouds come together. Then they join and form a hot core
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