Orion's Nebula (M42): Exploring the Orion's Sword Star Nursery
You're likely thinking of the Great Nebula in Orion, also known as Messier 42 (M42) or NGC 1976.
It's a bright diffuse nebula visible to the naked eye in the constellation Orion, located in the "sword" of Orion, just below the three stars that make up Orion's belt.
It's a stellar nursery where new stars are being born.
