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Celestial Objects

Cygnus X-1

Stellar-mass Black Hole

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Cygnus X-1 is a galactic X-ray source in the constellation Cygnus, discovered in 1964, and the first such source ever widely accepted to be a black hole.

Facts
Object Type
Stellar-mass black hole (X-ray source) 1
Discovery Year
1964 1
Sources
1. Wikipedia (space and spaceflight articles)
Wikimedia FoundationCygnus X-1, lead section
Quote, Cygnus X-1, lead section
the first such source widely accepted to be a black hole
1. Wikipedia (space and spaceflight articles)
Wikimedia FoundationCygnus X-1, discovery section
Quote, Cygnus X-1, discovery section
It was discovered in 1964 during a rocket flight
1. Wikipedia (space and spaceflight articles)
Wikimedia FoundationIn Category: Celestial Objects, Cygnus X-1, Wikipedia summary
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