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  • What was the name of the first object considered to be a ...
Multiple choice

What was the name of the first object considered to be a black hole?

  1. x-spectasy

  2. millified hole

  3. Cygnus X-1

  4. cypress x-1

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cygnus X-1 is a well-known galactic X-ray source that was the first widely accepted candidate for a black hole.

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