The Andromeda Galaxy (M31) is the closest large galaxy to the Milky Way and is one only ten galaxies that can be seen unaided from the Earth. In approximately 4.5 billion years the Andromeda Galaxy and the Milky Way are expected to collide. It is accompanied by at least 10 satellite galaxies the most notable of which is the Triangulum Galaxy.
Galaxy Profile
- Type: Spiral
- Distance from Milky Way: 2.5 million light-years
- Diameter: 260,000 light-years
- Mass: 400 billion solar masses
- Number of Stars: 1 trillion
Facts about Andromeda
- While Andromeda is the largest galaxy in the Local Cluster it is not thought to be the most massive as the Milky May is thought to contain more dark matter making it the most massive
- The Andromeda Galaxy is approaching the Milky Way at approximately 100 to 140 kilometres per second


why is it I read that E. Hubble figured Andromeda was about 800,000 light years away.
And here it says 2.5 million light yrs. Which is it ?
It’s 2.5 million – source
So when E. Hubble figured it using the Variable Star, the distance was off that much ?
Yeah it was
this is a cool website
Yup
Thanks you guys.
Pretty interesting how they can figure things out lioke these huge distances….
WAIT so this is a solor system do living things live in it like us
The Andromeda Galaxy isn’t a solar system, it’s a galaxy. It contains billions of solar systems itself however, therefore extraterrestrial life is theoretically guaranteed.
i think that if i could i would go to space right now
I would like to go to space it would be so cool it also be cool to see the plants