have been trying to locate M31 in Andromeda. I
certainly know where to look, but don't know what to look for. How
big should it look? Is it just star-sized, or should it be larger?


You are looking for a dim, fuzzy, milky blob; like a cloud. Bright
enough however to see in binoculars, try this first, then try your
'scope again. M31 should appear to cover a quarter to one third of
your field of view at low power.You'll know it when you see it :-)
jc



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