M17 - Swan Nebula

Messier 17, also known as the Swan Nebula, Omega Nebula, or Lobster Nebula, is a vast and active star-forming region located in the constellation Sagittarius, approximately 5,500 light-years from Earth. Spanning about 15 light-years across, M17 is composed of glowing ionised hydrogen gas illuminated by a cluster of young, massive stars hidden within its dense clouds..