The Lagoon Nebula, also known as Messier 8 (M8), is a vast star-forming region in the constellation Sagittarius, approximately 4,000 light-years away from Earth.
Sh2-155 (also known as the Cave Nebula or C 9) is a visible emission nebula in the constellation Cepheus. It is located four degrees SSE of the star ι Cephei, not far from the boundary ...