We are pleased to offer you our new deep sky target, imaged from a remote observatory in Portugal by the AstroDarkTeam composed of Pascal Gouraud and Stéphane Rolland. A total exposure of 75 hours was achieved between July 21 and August 22, 2023
Thanks again to the French Astro ARO team for the efficient management of this superb site which hosts us.
NGC 7635, also known as the Bubble Nebula, Sharpless 162, or Caldwell 11, discovered in November 1787 by
William Herschel, is an
H II regionemission nebula in the constellation
Cassiopeia. It lies close to the
open clusterMessier 52 we can see on the bottom right of our image.
The Bubble Nebula is 7 light-years across – about one-and-a-half times the distance from our sun to its nearest stellar neighbor, Alpha Centauri – and resides 7,100 light-years from Earth.
The "bubble" is created by the
stellar wind of a massive hot, 8.7
magnitude young
star, SAO 20575, a Wolf-Rayet star that shed its material to form the nebula. This star is thought to have a mass of about 44 solar mass.
The Bubble nebula is near a giant
molecular cloud excited by the hot central star, causing it to glow.
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