![]() ![]() It also includes the open cluster NGC 1981. Sh2-279 comprises three NGC nebulae, NGC 1973, NGC 1975, and NGC 1977 (see mouseover) that are divided by darker nebulous regions. The reflection nebula embedded in Sh2-279 is popularly known as the Running Man Nebula. It is the northernmost part of the asterism known as Orion's Sword, lying 0.6° north of the Orion Nebula. Sh2-279 (alternatively designated NGC 1977) is an HII region and bright nebulae that includes a reflection nebula located in the constellation Orion (lower left part of the image). Ptolemy identified it as a star of the sword of Orion, of magnitude 3. The nebula was recognized as such in 1610 by a French lawyer, Nicolas-Claude Fabri de Peiresc (1580-1637), although, given the size and brightness, it was certainly known even in prehistoric times. Observations with the most powerful telescopes (especially the Hubble Space Telescope) revealed many stars surrounded by rings of dust, probably the first stage in the formation of a planetary system. The Orion Nebula contains a very young open cluster, known as the Trapezium. ![]() ![]() It is one of the most photographed and studied objects of the sky, and is under constant control because of the celestial phenomena that take place inside astronomers have discovered protoplanetary disks, brown dwarfs and intense movements of gas and dust in its innermost regions. from the Earth, it extends for about 24 light years and is the star forming region closest to the Solar System. Clearly recognizable to the naked eye as an object of non-stellar nature, it is located south of the famous asterism of the Orion Belt, in the center of the so-called Sword of Orion, in the homonymous constellation. The Orion Nebula (also known as Messier 42 or M 42, NGC 1976, Sh2-281) is one of the brightest diffuse nebulae in the night sky. ![]()
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