Untitled Document
 How
much do you know about black holes? A black hole is a celestial body whose gravity is so massive that
even light cannot escape it.
The existence of black holes
was first considered by an English geologist, John Michell,
and a French mathematician, Pierre Simon Laplace, in 1783.
Recently, the National Aeronautics and Space Administration (NASA)미국항공우주국
found 26 new black holes in our nearest neighbor galaxy, Andromeda
Galaxy, which is about 2-3 million light years distant from the Earth!
 The black holes
were discovered by Chandra X-ray Observatory찬드라 X-선 천문대, and it took
over 13 years to catch them. This is the largest number of black holes
ever found in a galaxy. In fact, nine black holes were already spotted
in Andromeda Galaxy so far; as result of this new discovery, there
is a total of 35. An official of NASA said, “The black hole candidates
belong to the stellar mass
category, meaning they formed in the death throes of very massive
stars and typically have masses five
to 10 times that of our Sun.”
Meanwhile, space experts expect that some black holes can exist in
thousands of other galaxies. Where will the next black holes be found?
How amazing and interesting the world of space is! |
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