M20, aka Trifid nebula (HaLRGB)

The Trifid Nebula is a colorful combination of nebulae types that unite to create a celestial work of art. Cataloged as Messier 20, the Trifid Nebula is a magnitude +6.3 H II region of interstellar gas in the constellation Sagittarius. It lies approximately 5,000 light-years away in a nebula-rich, crowded star-field area of the night sky. It is often photographed next to the nearby emission nebula, M8 (the Lagoon Nebula).