.Collections of superstars set the interstellar medium ablaze in the Andromeda Universe about 2.5 million light-years away. Also referred to as M31, Andromeda is the Galaxy's closest significant universe. It gauges approximately 152,000 light-years across and also, along with virtually the very same mass as our home galaxy, is actually headed for a collision along with the Milky Way in 2-4 billion years. In the meantime, Andromeda remains an object of study for lots of stargazers.