Cygnus X-1 is a black hole about 15 times the mass of the Sun in orbit with a massive blue companion star.  Astronomers used several telescopes including Chandra to study Cygnus X-1.  The combined data have revealed the spin, mass, and distance of this black hole more precisely than ever before.  Stephen Hawking lost a bet - originally placed in 1974 -- that Cygnus X-1 did not contain a black hole.

Cygnus X-1 is a black hole about 15 times the mass of the Sun in orbit with a massive blue companion star. Astronomers used several telescopes including Chandra to study Cygnus X-1. The combined data have revealed the spin, mass, and distance of this black hole more precisely than ever before. Stephen Hawking lost a bet - originally placed in 1974 -- that Cygnus X-1 did not contain a black hole.

Black Holes Can Get Really Big, And We Have No Idea Why--Illustration of Cygnus X-1, a stellar-mass black hole located 6070 ly away. (NASA/CXC/M.Weiss)

Are Black Holes All Shaped Like Doughnuts?

Black Holes Can Get Really Big, And We Have No Idea Why--Illustration of Cygnus X-1, a stellar-mass black hole located 6070 ly away. (NASA/CXC/M.Weiss)

Media by Bryon Gloden CISSP published February 17 2017 at 12:12AM

February 17, 2017 at 12:09AM

Media by Bryon Gloden CISSP published February 17 2017 at 12:12AM

AGUJERO NEGRO (CYGNUS X-1) Björn Dahlem Desde el 19 de septiembre 2014 al 11 de enero 2015

AGUJERO NEGRO (CYGNUS X-1) Björn Dahlem Desde el 19 de septiembre 2014 al 11 de enero 2015

Aguero Negro (CYGNUS X-1) by Björn Dahlem - Matadero Abierto por Obras ©EXITospain

Aguero Negro (CYGNUS X-1) by Björn Dahlem - Matadero Abierto por Obras ©EXITospain

Cygnus-X1.Net: A Tribute to Star Trek

Cygnus-X1.Net: A Tribute to Star Trek

Tulip Nebula, at least in the field seen from earth, is in close proximity to microquasar Cygnus X-1, site of one of the first suspected black holes. It is also called Sharpless 101 (Sh2-101) or the Cygnus Star Cloud because the nebula located in the constellation Cygnus.

Tulip Nebula, at least in the field seen from earth, is in close proximity to microquasar Cygnus X-1, site of one of the first suspected black holes. It is also called Sharpless 101 (Sh2-101) or the Cygnus Star Cloud because the nebula located in the constellation Cygnus.

;-) - MVIDEO: Remastered version of this outstanding fan-made video of Cygnus X-1, now in HD720!  Improvements include full screen resolution and consistency in aspect ratios throughout the video.  Video now synchronized with music, as per viewer requests.

;-) - MVIDEO: Remastered version of this outstanding fan-made video of Cygnus X-1, now in HD720! Improvements include full screen resolution and consistency in aspect ratios throughout the video. Video now synchronized with music, as per viewer requests.

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