As we know, our Earth is a part of the solar system and the solar system is a part of our Milky Way Galaxy. The nearest galaxy to the Milky Way Galaxy is the Andromeda Galaxy. Andromeda Galaxy is about 2.5 light million light years away from our Galaxy.
Age – 4.5 billion years
Mass – 400 – 700 billion solar mass
Diameter – 220,000 light years
Some interesting facts
- Andromeda Galaxy is also known as Messier 31 or M31 which is named after the French astronomer.
- Until the 1700 century, The Andromeda Galaxy was previously considered as a part of the Milky Way Galaxy and continued to be known as Andromeda nebula. However, it was accepted as a galaxy after the invention of Edwin Hubble.
- The local group consists of 54 galaxies. The Andromeda Galaxy is the largest in our nearest Galaxy Cluster, which we call the Local Group.
- According to scientists, Andromeda Galaxy is filled with trillions of stars. Like our Milky Way Galaxy, Andromeda Galaxy also has black holes.
Apart from the supermassive black hole at the center of a Andromeda galaxy, there are 26 more known black holes within this galaxy.
- According to scientists, in about 5 billion years this Andromeda Galaxy can hit our Milky Way galaxy because Andromeda is moving towards us at a speed of 100 to 140 km/s.
- Approximately about 5000 to 9000 million years ago, it is believed that the Andromeda galaxy was formed by the collision of 2 Galaxies.
- The Hubble photograph taken in 1991 revealed that Andromeda has double nucleus.