Emission Nebula in Orion

Numéro d’image : 12632109
Emission Nebula in Orion
Sh2-276, Barnard's Loop, is the largest emission nebula in the image and one of the largest in the night sky. It is seen as a semi-circle around the belt and sword of Orion. At its estimated distance of 1600 light-years, the loop is 300 light-years across in space. This entire area is part of the Orion Molecular Cloud, a gigantic star forming region that covers most of the constellation of Orion including the Orion Nebula, Horsehead Nebula and Witch Head Nebula. Hot young stars in the Orion Nebula are believed to be powering the ionization that illuminates the nebulosity in the region. Barnard's Loop is thought to be part of the inner surface of a large hydrogen bubble that contains the Orion OB1 association, a group of hot young stars of spectral type O and B that have formed recently and that energize the nebula. The bubble may have been formed 3 million years ago by a series of supernova explosions.
Licence : Droits gérés
Crédit: Science Photo Library / Lodriguss, Gerard
Taille de l’image : 3826 px × 2550 px
Model Release : Non requis
Property Release : Non requis
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