M31

Image Description and Details : 

Consisting of 300 billion stars, the Andromeda galaxy M31 is considered the twin sister of our Galaxy. It is accompanied by two much smaller satellite galaxies, M32 and M110. The Andromeda Galaxy is the most distant object that can be seen without an instrument under good skies, at 2.5 million light years.
Image taken in Normandy (France), by Team Newastro; (astronew.fr) , with Tube Newton Skyvision (250-900 f/d 3,6) on Eq8 mount, 
ZWo Asi 6200MM camera.
Image in L,r,v,b and Ha. Total exposure time 7 hours.

Copyright: astronew.fr