M31 - Andromeda The Andromeda Galaxy (M31), a spiral galaxy located approximately 2.5 million light-years away. Andromeda Galaxy spans more than 220,000 light-years across and contains roughly a trillion stars — more than twice the number in our own Milky Way. If you look closely, you can spot its satellite galaxies M32 and M110, which appear as soft elliptical glows nearby. M31 - Andromeda Annotated This image was stacked and processed to reveal the faint dust lanes, glowin