M42 - The Orion Nebula
Technical details.
Taken with a 400mm Canon lens on a 20Da, 25 exposures each of 30s at iso 400. Stacked using ImagesPlus and processed in Photoshop.

M42 The Orion Nebula
This brilliant Nebula was apparently missed by Galileo who did study Orion. It is one of the grandest naked eye nebulae just below the belt of Orion in the sword. It is 1500 light-years distant. The running man nebula is to be seen to the left in the above image.