The Bubble Nebula sits 7,100 light years away in the constellation Cassiopeia. The hot start forming this nebula is 45 times larger than our own sun! Hot gas gets released from the star that sweeps up the cold interstellar gas in front of it forming the outer edge of the bubble. Since the star burns so hot it is believed this relatively young star will explode into a supernova in 10 million to 20 million years.
This image is made from 101 Exposures for a total of 16.5 hours.