Andromeda Galaxy Andromeda Galaxy The Andromeda Galaxy (), also known as Messier 31, M31, or NGC 224, is a spiral galaxy approximately 780 kiloparsecs (2.5 million light-years) from Earth, and the nearest major galaxy to the Milky Way. Its name stems from the area of the sky in which it appears, the constellation of Andromeda. The 2006 observations by the Spitzer Space Telescope revealed that the Andromeda Galaxy contains approximately one trillion stars, more than twice the number of the Milky Way's estimated 200 to 400 billion stars. The Andromeda Galaxy's mass is estimated to be around 1.76 times that of the
The Hitchhiker's Guide to the Galaxy to make way for a hyperspatial express route five minutes before the conclusion of its 10-million-year program. Two members of the race of hyper-intelligent pan-dimensional beings who commissioned the Earth in the first place disguise themselves as Trillian's mice, and want to dissect Arthur's brain to help reconstruct the question, since he was part of the Earth's matrix moments before it was destroyed, and so he is likely to have part of the question buried in his brain. Trillian is also human but had left Earth six months previously with Zaphod Beeblebrox, President of the Galaxy. The protagonists escape, setting