.Collections of stars specified the interstellar medium ablaze in the Andromeda Galaxy about 2.5 million light-years away. Likewise called M31, Andromeda is actually the Milky Way's closest primary galaxy. It measures around 152,000 light-years around and also, along with nearly the same mass as our home universe, is gone to a collision along with the Galaxy in 2-4 billion years. Meanwhile, Andromeda stays an item of research for several stargazers.