Location of photoZagreb, Croatia
Date/Time of photo24/12/2017
EquipmentOptical system: Samyang 135mm f/2 @ f/2.8 Camera : Canon 600d astromod Mount and guiding: SW EQ6Pro unguided Exposure: 72x90 sec, dark, flat, bias Software: BackyardEOS, Pixinsight 1.8, PS-CS6
DescriptionThis is widefiled shot of Orion complex. It was shot in heavy light pollution without any filters. The Orion Molecular Cloud 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. The presence of ripples on the surface of Orion's Molecular Cloud have been discovered recently. The ripples result from the expansion of the nebulae gas over pre-existing molecular gas.