Orion Nebula
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The Orion Nebula is a diffuse nebula in the Milky Way situated south of Orion's Belt in the constellation of Orion, and is known as the middle "star" in the "sword" of Orion. It is one of the brightes
The entire Orion Nebula in a composite image of visible light and infrared; taken by Hubble Space Telescope in 2006
The constellation of Orion with the Orion Nebula (lower middle)
Messier's drawing of the Orion Nebula in his 1771 memoir, Mémoires de l'Académie Royale
Herschel's drawing of the nebula as seen from the southern hemisphere as part of his survey of the visible heavens, 1835.
H II region
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An H II region is a region of interstellar atomic hydrogen that is ionized. It is typically in a molecular cloud of partially ionized gas in which star formation has recently taken place, with a size
NGC 604, a giant H II region in the Triangulum Galaxy, taken by the Hubble Space Telescope
Dark star-forming regions within the Eagle Nebula commonly referred to as the Pillars of Creation
A small portion of the Tarantula Nebula, a giant H II region in the Large Magellanic Cloud