A Brief History of Time

Why do scientists think that there is a black hole in the star system Cygnus X-1?

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Asked by Cat on 10 Jan 04:38

Last updated by Cat on 10 Jan 04:40

1 Answers

Answered by Cat on 10 Jan 04:40

Scientists believe there is a black hole because a visible star is orbiting something, and a white dwarf or pulsar doesn't have strong enough gravity to create the orbiting effect, so it must be a black hole.