Orion Nebula
The Orion Nebula is a diffuse nebula situated south of Orion's Belt in the constellation of Orion. It is one of the brightest nebulae, and is visible to the naked eye in the night sky. It is located at a distance of 1,344 light years and is the closest region of massive star formation to Earth. The nebula is estimated to be 24 light years across with mass of about 2,000 times that of the Sun.