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Carina Nebula
The Carina Nebula (also known as the Great Nebula in Carina, the Eta Carinae Nebula, NGC 3372, as well as the Grand Nebula) is a large bright nebula that has within its boundaries several related open clusters of stars, all part of the large OB association Carina OB1. The two star clusters Trumpler 14 and Trumpler 16 are the youngest clusters in the association, but Trumpler 15, Collinder (Cr) 228, Cr 232, NGC 3324, and NGC 3293 are all considered members. Trumpler 14 is one of the youngest known star clusters, at half a million years old. Trumpler 16 is the home of WR 25, currently the most luminous star known in our Milky Way galaxy, together with the less luminous but more massive and famous Eta Carinae star system, and HD 93129A. NGC 3293 is the oldest furthest from Trumpler 14, indicating sequential and ongoing star formation. The nebula lies at an estimated distance between 6,500 and 10,000 light years from Earth. It appears in the constellation of Carina, and is located in the Carina–Sagittarius Arm. The nebula contains multiple O-type stars.
The nebula is one of the largest diffuse nebulae in our skies. Although it is some four times as large and even brighter than the famous Orion Nebula, the Carina Nebula is much less well known, due to its location in the southern sky. It was discovered by Nicolas Louis de Lacaille in 1751–52 from the Cape of Good Hope.
== Objects within the Carina Nebula ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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