This is a H II region located near the centre of the constellation Canis Major composed of ionised hydrogen.
 
The bright star is called EZ Canis Majoris is pre-supernova.
 
The nebula is about 4530 light-years away from Earth.
 
The image was taken over two weeks totaling 16 hours of photographs.
 
The image was taken from a back yard in Winton Central Queensland, Australia.
 
The image was taken using a Skywatcher Esprit 120ED refractor telescope with a ZWO ASI6200MM-P colour camera.