Bubble Nebula

What's behind this interstellar phenomenon floating in the far reaches of space?

11,000 light years away in the Cassiopeia constellation can be found this fascinating nebula that at first glance bears resemblance to a bubble. Also known as NGC 7635, the ten-light-year-wide Bubble Nebula is an emission nebula that was formed from a young and hot star at its centre. It was first discovered in 1787 by William Herschel, and since then it has been the subject of detailed observations. Near the centre of the bubble can be seen the bright star BD+60°2522, several hundred thousand times more luminous and nearly 50 times more massive than the Sun. This star blasted out intense radiation and a fierce stellar wind, which in turn interacted with denser material in a surrounding molecular cloud and formed the Bubble Nebula. The nebula itself is one of…

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