Orion Great Nebula (M42)

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This is a nebula which is known as one of the great star forming regions of our galaxy. You will have probably seen many pictures of it in books and magazines. It is not so spectacular in modest binoculars. Like many objects, it is theoretically visible to the naked eye but needs a dark site. If you have seen the North America Nebula, the Orion Great Nebula is smaller and brighter. It also has 4 stars embedded within it known as the Trapezium, which are not always visible to 50mm binoculars and some nice surrounding stars, giving the appearance of a cluster.

It also has a smaller nebula (M43) close to it, which is actually part of the same star-forming region.

 
Photograph courtesy of Steve Reid.

You can find it by going to the left side of Orion’s belt and scanning south.

The Orion Great Nebula is centred at RA 5h 35.4m Dec -5 deg 27 min.

The Orion Great Nebula can be seen from about midnight in October to just after darkness in May.

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