.Sets of superstars established the interstellar medium ablaze in the Andromeda Galaxy concerning 2.5 thousand light-years away. Also called M31, Andromeda is actually the Milky Way's closest major galaxy. It measures approximately 152,000 light-years across and, with virtually the same mass as our home universe, is actually headed for a crash along with the Galaxy in 2-4 billion years. For the time being, Andromeda continues to be an object of research study for many stargazers.