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.
Two bright emission nebulae side by side, at least relatively speaking. NGC 3603 to the left is much further away than NGC 3576 on the right by about 14,000 light years. NGC 3576 has be...