So the galaxy in the background is Andromeda?
No. The Andromeda galaxy is only about 2.5 light-years away. It lies within our own local group of galaxies. This one is part of a more distant group which just happens to lie in the constellation of Andromeda .
"NGC 891 is an edge on unbarred spiral galaxy about 30 million light-years away in the constellation Andromeda. It was discovered by William Herschel on October 6 1784. The galaxy is a member of the NGC 1023 group of galaxies in the Local Supercluster. It has an H II nucleus."
Nope. This is Andromeda: