The Omega Nebula is designated Messier 17 and is sometimes called the Swan Nebula. It is located further south of the well-known Eagle Nebula (Messier 16) and is therefore a difficult target for those who want to image the nebula from the northern hemisphere.

The nebula is about 6'000 light years away from earth and about 15 light years in diameter. The open star cluster NGC 6618 lies in the nebula itself and makes the gases of M17 glow. The slightly less bright, detached part of the nebula next to the core is on closer inspection part of the other half of the nebula. But it looks like two nebulae, because a large dark nebula divides the luminous gas.

Source: Omega Nebula

Image on Astrobin: https://www.astrobin.com/nj7vw3/
Image in Instagram: https://www.instagram.com/p/Cvo4RH0snLM/?utm_source=ig_web_copy_link&igshid=MzRlODBiNWFlZA==