The Carina Nebula is a bright, large emission nebula surrounding the star Eta Carinae, located in the southern constellation Carina. It is also sometimes called the Eta Carinae Nebula, the Grand Nebula, or the Great Nebula in Carina. The nebula’s designation in the New General Catalogue is NGC 3372. It is one of the largest diffuse nebulae known, one that contains several open star clusters. The Carina Nebula is home to several notable objects: the Mystic Mountain, the Homunculus Nebula, and the Keyhole Nebula. The Carina Nebula lies in the Carina-Sagittarius Arm of the Milky Way, at a distance between 6,500 and 10,000 light years from Earth. The estimated distance of the nebula is 7,500 light years.