- Source: Bubble Nebula
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 open cluster Messier 52. The "bubble" is created by the stellar wind from a massive hot, 8.7 magnitude young central star, SAO 20575 (BD+60°2522). 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 November 1787 by William Herschel. The star BD+60°2522 is thought to have a mass of about 44 M☉.
Amateur observation
With an 8-or-10-inch (200 or 250 mm) telescope, the nebula is visible as an extremely faint and large shell around the star. The nearby 7th magnitude star on the west hinders observation, but one can view the nebula using averted vision. Using a 16-to-18-inch (410 to 460 mm) scope, one can see that the faint nebula is irregular, being elongated in the north south direction.
See also
Lists of nebulae
Notes
References
External links
NGC7635 The Bubble Nebula
Bubble Nebula on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
Bubble Nebula at Constellation Guide
NASA Astronomy Picture of the Day: NGC 7635: Bubble in a Cosmic Sea (November 23, 2016)
Kata Kunci Pencarian:
- Nebula Mata Kucing
- Daftar objek NGC 7001 - 7840
- Karen Gillan
- Wolf-Rayet
- Permainan video dalam tahun 2008
- Awan Antarbintang Lokal
- Bubble Nebula
- Soap Bubble Nebula
- Bubble
- List of largest nebulae
- Crescent Nebula
- Rosette Nebula
- Cat's Eye Nebula
- Veil Nebula
- Egg Nebula
- Stellar-wind bubble
