You probably know Tonks, Harry Potter's clumsy Auror friend. Still, did you know her mother's name is Andromeda?
The order Cetacea includes sea mammals like whales, porpoises, and dolphins. The term Cetacea is derived from the name of Cetus, the monster who comes to eat Andromeda (source).
The USS Cetus was the name of a cargo ship during WWII (source).
Scientists say that the Milky Way, our galaxy, will collide with the neighboring Andromeda galaxy in about 4 billion years (source).
Perseus is sometimes shown riding the winged horse, Pegasus, to rescue Andromeda. In the original Greek myths, though, it was the hero Bellerophontes who tamed the winged horse (source).
Andromeda was name of a sci-fi show created by Gene Rodenberry, who also created Star Trek (source).
The Andromeda Strain is the name of a thriller by novelist Michael Crichton. It's about a deadly virus from outer space.
Perseus, Andromeda, Cepheus, Cassiopeia, and Cetus are all names of constellations.