How old is the Andromeda galaxy?
The Andromeda Galaxy is believed to be created around the same time as the Milky Way Galaxy. This would put it's age close to just after the "big bang" at around 13.2 billion years.
The nearest large Galaxy is the Andromeda Galaxy or M31 (also Great Andromeda Nebula in old texts) It is a spiral galaxy, located about 2.5 million years from us. Unlike most galaxies, the Andromeda Galaxy is getting nearer to us and will eventually in a few billion years time "merge" with the Milky Way. See related link for more information
Messier 31 or M31 or the Andromeda Galaxy is the nearest large spiral galaxy to Earth. It is commonly assumed wrongly to be the closest galaxy to our own but other smaller galaxies are closer. In fact it is the 35th nearest galaxy to us. The Canus Major Dwarf Galaxy is thought to be closest at 42,000ly from the galactic core and 25,000ly from earth. It is infact closer to the solar system than the…
Just about as far as the closest star in the Andromeda Galaxy. The diameter of the Andromeda galaxy is ... well, quite huge, but still relatively small, compared to the distance between us and the Andromeda Galaxy. And I believe this diameter may still be smaller than the uncertainty in the distance estimate!