Black hole, conceptual illustration
Black hole, conceptual illustration. This is a region in space where the force of gravity is stronger than the speed of light, making it impossible for light to escape. The intense gravity is caused by the compression of matter into a small area, such as when a star's core collapses. As the matter spirals into the black hole, it becomes more compact and hotter, emitting radiation., by VICTOR de SCHWANBERG/SCIENCE PHOTO LIBRARY
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