Tuesday, October 9, 2012

Picture of the Day: 10/9/12

Simeis 147. Source

This supernova remnant, the gaseous and dusty remains of a star, is a long way off, but it's really, really big. Even though Simeis 147 is 3,000 light years away it still takes up nearly 3 degrees of the night sky, that's almost 6 full moons worth. That corresponds to Simeis 147 being 150 light years across. Too bad it's not nearly bright enough to be seen with the naked eye.

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