Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  Bubble nebula  ·  M 52  ·  NGC 7635  ·  NGC 7654  ·  PK112-00.1  ·  Sh2-162
NGC 7635 Bubble Nebula & Open Cluster Messier 52, Gebhard Maurer
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NGC 7635 Bubble Nebula & Open Cluster Messier 52

NGC 7635 Bubble Nebula & Open Cluster Messier 52, Gebhard Maurer
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NGC 7635 Bubble Nebula & Open Cluster Messier 52

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Description

NGC 7635, also known as the Bubble Nebula, Sharpless 162 or Caldwell 11, is an H II region emission nebula in the constellation Cassiopeia. It lies close to the direction of the open cluster Messier 52. The "bubble" is created by the stellar wind from a massive hot, 8.7 magnitude young central star, SAO 20575. The nebula is near a giant molecular cloud which contains the expansion of the bubble nebula while itself being excited by the hot central star, causing it to glow. It was discovered in 1787 by William Herschel.

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NGC 7635 Bubble Nebula & Open Cluster Messier 52, Gebhard Maurer