Spiral gas disc in core of M87

Spiral gas disc in core of M87

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Credit: NASA/ESA/STSCI/H.FORD ET AL/SCIENCE PHOTO LIBRARY

Caption: Evidence for a black hole in galaxy M87. False- colour optical image made by the Hubble Space Telescope of a spiral disc of hot gas in the core of galaxy M87, providing evidence for a black hole. In the right-hand image, a large optical jet is seen running toward top right. This is caused by emissions of high-speed electrons thought to come from a black hole. Spectroscopic measurements of the rotational velocity of the gas disc indicate a massive gravitational field in the core, far larger than may be explained by the density of stars in the centre. The black hole has a mass about 3 billion times that of the Sun.

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Keywords: astronomy, black hole, black hole eviden, core, cosmology, evidence of, galactic, galax, galaxy, gas disk, gas disk in core, hubble, m87, post repair, science

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