![]() ![]() But we have developed several ways to find them anyway.īy looking for the stuff that’s falling in.If material is falling into a black hole, it travels at such high speeds that it gets hot and glows very brightly, and we can detect that. Scientists think they can tell us much more about these and other essential rules of the universe.Īnd on a more personal level, the supermassive black hole at the center of our own Milky Way galaxy may have played a role in how Earth came to be here! What do black holes look like?īlack holes themselves are invisible-they emit virtually no light and so cannot be seen directly. For example, black holes have helped us test Einstein’s theory of general relativity, which describes how mass, space, and time are related to one another. In the past decade, scientists have detected the signals of their collisions and taken images of the light from the gas swirling around them-and this has helped us learn many things about the universe. One of the first steps toward the discovery of black holes was made by University of Chicago professor Subrahmanyan Chandrasekhar, when he realized that massive stars would have to collapse after they ran out of fuel for the fusion reactions which keep them hot and bright. If you packed more and more mass into the same tiny space, eventually it would create gravity so strong that it would exert a significant pull on passing rays of light.īlack holes are created when massive stars collapse at the end of their lives (and perhaps under other circumstances that we don’t know about yet). ![]() When you pick up a bowling ball, it’s heavy because the matter is densely packed. What do scientists still not know about black holes?īlack holes are made of matter packed so tightly that gravity overwhelms all other forces.How was the first picture of a black hole taken?.What do black holes tell us about the universe?. ![]()
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