
1) Cloud found below the belt
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https://www.crosswordclues.com/clue/orion-nebula

The Orion Nebula (also known as Messier 42, M42, or NGC 1976) is a diffuse nebula situated south{Ref label|B|b|none} 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. M42 is located at a distance of 1,344 ± 20 light years and is the closest region of massive star ....
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http://en.wikipedia.org/wiki/Orion_Nebula

(catalog numbers NGC 1976 and M 42), bright diffuse nebula, faintly visible to the unaided eye in the sword of the hunter`s figure in the ... [9 related articles]
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http://www.britannica.com/eb/a-z/o/31
(M42, NGC 1976) Orion Nebula. Image: Spizer Space Telescope The best known diffuse nebula and one of the nearest regions to the Sun in which stars are presently being formed. It is visible to the naked eye south of Orion's Belt as a fuzzy patch known as Orion's Sword....
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http://www.daviddarling.info/encyclopedia/O/OrionNeb.html

Luminous cloud of gas and dust 1,500 light years away, in the constellation Orion, from which stars are forming. It is about 15 light years in diameter, and contains enough gas to make a cluster of thousands of stars. At the nebula's centre is a group of hot young stars, called the Trapezium, which make the surrounding gas glow. The nebula is v...
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https://www.encyclo.co.uk/local/21221

a luminous nebula in the constellation Orion, in the center of Orion's sword. Also called
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https://www.infoplease.com/dictionary/orion-nebula
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