The Orion Molecular Cloud Complex (or, simply, the Orion Complex) is a large group of bright nebulae, dark clouds, and young stars in the Orion constellation. The cloud is between 1 500 and 1 600 light-years away, and hundreds of light-years across. Several parts of the nebula can be observed through binoculars and small telescopes, and some parts (such as the Orion Nebula) are visible to the naked eye.

The nebula is important because of its sheer size, as it spreads several degrees from Orion's Belt to his sword. It is also one of the most active regions of stellar formation visible in the night sky, and is home to both protoplanetary discs and very young stars. The nebula is bright in infrared wavelengths due to the heat-intensive processes involved in the stellar formation, though the complex contains dark nebulae, emission nebulae, reflection nebulae, and H II regions.

List of Nebulae within the complexEdit

The following is a list of notable nebulae within the larger nebula complex:

Also the Orion OB1 Association is part of this complex.

See alsoEdit


External linksEdit

  1. "NAME ORI COMPLEX -- Cloud". SIMBAD. Retrieved 2014-03-14.
  2. "NAME ORI MOL CLOUD -- Molecular Cloud". SIMBAD. Retrieved 2014-03-14.
  3. "Orion's Big Head Revealed in Infrared". Nasa. Retrieved 24 February 2015.
    1. Orion Cloud Complex
    2. SEDS website
    3. Clickable table of Messier Objects
    4. Orion images