Since I can't take photographs of faint celestial objects, here's the nearest I can get to Andromeda, spotted on the way to Wallsend. I was so pleased when I realised that the light pollution in Wigton is low enough to be able to see the Andromeda Galaxy. Looking up the Andromeda Galaxy, I realise that I have half understood certain things. I had thought it smaller than the Milky Way but it is at least as big. Also that as the nearest galaxy, it was the first to suggest that it was so distant as to be outside the Milky Way, rather than just a cluster of stars within the Milky Way.
https://en.wikipedia.org/wiki/Andromeda_Galaxy I'm working on an understanding of virial mass!