Tuesday, April 9, 2013

Andromeda Galaxy --->Will this destroy our Solar system?

The Andromeda Galaxy is a spiral galaxy approximately 2.537x10^6 light-years or 1.604x10^11 AU (2.4×10^19km) away from us. Other name for this galaxy is Messier 31, M31, NGC 224,UGC 454, PGC 2557, 2C 56 (Core), LEDA 2557. This is the nearest spiral galaxy to our Milky Way galaxy.

This is the largest galaxy in the local group ( having approximately 1000000000000(1 trillion) stars.  It is more than double the number than in the Milky Way).
Mass of Andromeda galaxy is approximately 1411870500000000000000000000000000000000000 kg (1.4x10^42 kg).

The Andromeda Galaxy on a German postage stamp of 1999.


What is the special thing about this galaxy.

Andromeda is going to collide with our Milky Way galaxy. Both expected to collide in about 4.5 billion years. Andromeda is approaching Milky Way with 100 to 140 km/sec.
Both will collide and become a giant elliptical galaxy. It has been nicknamed Milkomeda or Milkdromeda.

If both will collide, solar system won’t be there. Based on current calculations they predict a 50% chance that in a merged galaxy the solar system will be swept out three times farther from the galactic core than it is currently located. They also predict a 12% chance that the Solar System will be ejected from the new galaxy some time during the collision.

Anyway we don’t need to get worry about this because earth will not be there after 400 crores years.
Confusing, yes sun is enlarging day by day. About 200 crores years, sun will eat earth. Even if we are in mars also, sun will eat us.
But in future we may travel in time. After 200 crores years we would be living in some other planet outside from our milky way. Anything will happen in future.












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