Nebulae - celestialpixels
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The Bubble Nebula - NGC 7635

The Bubble Nebula - NGC 7635

NGC 7635, also called the Bubble Nebula, Sharpless 162, or Caldwell 11, is a 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, young central star. 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 Friedrich Wilhelm Herschel. With an 8 or 10-inch (250 mm) telescope, the nebula is visible as an extremely faint and large shell around the star.[1][2] The nearby 7th magnitude star on the west hinders observation, but one can view the nebula using averted vision

Equinox ED120, ATIK314L, Baader Narrowband Filters: Ha, Si, O3, Total Exposure: 12 Hours

BubbleNebulaNGC7635