Also known as NGC 2237, the Rosette Nebula is a vast cloud of dusty hydrogen gas about 100 light-years across and 5000 light-years away. Within it, a cluster of brilliant young stars that formed “only” about four million years ago (NGC 2244) have left a clearing in the center and are what so beautifully illuminate the surrounding rose-shaped nebula.
http://apod.nasa.gov/apod/ap070214.html

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