ocr: BLACK HOLE As singularity in spacetime. A celestial object, whose escape velocity is larger than the speed of light So that even light (which can be thought of as particles) cannot break free from a black hole due to its massive gravitation. This is why black holes are invisible. Matter that falls in and heats up is the only clue to a black hole; it can be detected as faint radiation. An invisible black hole has been made visible here. A black hole is born when a stor with great mass explodes and becomes a supernovo offer running out the fuel which kepf ifs nuclear fusions go- ing. The remains ...
