Orion Molecular Cloud Complex

A huge cloud of gas and dust in the Orion Arm of the Milky Way Galaxy that is forming stars and stellar systems. It covers most of the area of the constellation Orion as viewed from Earth, and contains new stars, protostellar objects, forming stellar systems, emission and absorption nebulae, and more.
It lies between 1000-1400 light years (LY) away, and is easily hundreds of light years in diameter.

A partial list of the objects within the cloud complex includes, but is not limited to:
*Orion A Molecular cloud
+The Orion Nebula, also known as M42 (part of Orion's Sword)
+M43, which is part of the Orion Nebula
+Sh2-279 (part of Orion's Sword)
+NGC 1980 (part of Orion's Sword)
+Orion Molecular Cloud 1 (OMC-1)
=Becklin–Neugebauer Object
=Kleinmann–Low Nebula
+Orion Molecular Cloud 2 (OMC-2)
+Orion Molecular Cloud 3 (OMC-3)
+Orion Molecular Cloud 4 (OMC-4)
+NGC 1981
+NGC 1999
+LDN 1641
+HH 1/2, the first two recognized Herbig-Haro objects
+HH 34 a Herbig-Haro object with symmetric bow shocks
*Orion B Molecular cloud
+Flame Nebula (NGC 2024)
+IC 434
=The Horsehead Nebula (Barnard 33)
+M78, a reflection nebula (NGC 2068)
+McNeil's Nebula is a variable nebula discovered in 2004 near M78
+Orion East Cloud (LDN 1621 + LDN 1622)
+HH 24-26
+HH 111
*Orion OB1 Association
+Orion's Belt
+Sigma Ori cluster
+25 Ori cluster
*Lambda Orionis molecular ring (Sh2-264)[4]
+Lambda Ori cluster
+Barnard 30
+Barnard 35
*Orion-Eridanus superbubble
+Barnard's Loop (Sh2-276)
+Eridanus Loop