Tuesday, May 21, 2013

APOD 4.7

Messier 77 
M77 is a spiral galaxy 47 million light-years from Cetus. It spans 100,000 light-years across. The core is important and widely studied for its value in learning about supermassive black holes in Seyfert galaxies. While this image was based on Hubble data, M77 is also seen at x-ray, ultraviolet, infrared, and radio portions of the electromagnetic spectrum. This picture particularly exhibits the galaxies bright core and spiral arms. Star-forming regions appear red and dust clouds trace the bright spiral arms.

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