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- BLACK HOLE
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- A 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.
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- An invisible black hole has been made visible here.
- A black hole is born when a star with great mass explodes and becomes a supernova after running out the fuel which
- kept its nuclear fusions going. The remains of the matter form a black hole.
- The existence of black holes has been difficult to prove due to their invisibility, but there are several candidates. Huge
- black holes, with millions of times the mass of the Sun might be found in the centres of distant galaxies, forming
- quasars. It is suspected that a black hole is located also in the centre of our own Galaxy.
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