Cygnus X-1 star

Cygnus X-1 star

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Credit: ROYAL GREENWICH OBSERVATORY/SCIENCE PHOTO LIBRARY

Caption: Cygnus X-1 star. Negative optical image of the star (arrowed) associated with the X-ray source Cygnus X-1, thought to contain a black hole. Black holes are areas of space where the gravitational field is so strong that light cannot escape. It is thought Cygnus X-1 contains a black hole in mutual orbit with a larger companion star. This system emits X-rays as gas pulled from the star is accelerated and heated as it is sucked into the hole. Cygnus X-1 lies around 82,000 light years from Earth in the constellation Cygnus.

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Keywords: astronomy, astrophysics, black hole candidate, black-and-white, cosmology, cygnus x-1, monochrome, negative, optical imagery, peculiar, science, space, star death, starfield, stellar, x-ray source, xray

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