Caption An animation showing the Cygnus X-1 system, consisting of a black hole in orbit with a giant star. Recent observations by radio telescopes have found the system is 20 per cent further away ...
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What Is a Black Hole? Astronomy's Most Mysterious Object, ExplainedWhy Do Black Holes Form? Black holes form when a huge amount of matter is squeezed into a very small space. Cram enough ...
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