Messier 33, the Triangulum galaxy

Messier 33 is one of the galaxies of the Local Group, the most massive after the Andromeda Galaxy and the Milky Way. It is very bright and is extremely rich in HII regions.

Astro-Physics 92 Stowaway refractor, ZWO ASI 2600 MM-Pro camera. Total exposure time: 16 hours and 45 minutes.