- The Milky Way, the galaxy that contains our solar system, is approximately half the weight of a neighbouring galaxy — known as Andromeda — which has a similar structure as our own.
- Astronomers call the Milky Way and Andromeda as Local Group which are the two largest in a region of galaxies:
- The mass of invisible matter found in the outer regions of both galaxies and appear to be of similar dimensions.
- Andromeda contains twice as much dark matter than Milky way,causing it to be twice as heavy.
- Read at:http://www.thehindu.com/
todays-paper/tp-in-school/ milky-way-much-smaller-than- thought/article6265302.ece