(Image painted by an artist of Andromeda-Milky Way collision seen on earth)
Yo! Another informative news to share. Have you ever wander that whether there is other galaxy other than Milky Way? Yes, there is. It is know as the Andromeda galaxy or M31. Though this is the nearest galaxy to us, it is about 2.9 million light-years away from the Milky Way. 1 great fact that interest me was that Andromeda galaxy is approaching the Sun at the speed of about 300km per sec! An the fact that the Milky Way Galaxy and the Andromeda Galaxy is approaching each other at the speed of 140 km per sec! and of course they will collide eventually, at a predicted time 3 billion years ahead. Let do some calculation.
1 Lightyear =
300000000 x 60 x 60 x 24 x 365
= 9460800000000000 km!
If they are approaching at 140 km per sec. They will collide is just
9460800000000000 / 140
= 67577142857142 secs
= 1126285714285 mins
= 18771428571 hours
= 782142857 days
= 2142857 years
= about 2 million year for one light year
2.9 million lightyear
= 2142857 x 2900000
= 6214285300000 years 0.o
My calculation error? nvm... forget it
Let's continue...
The Andromeda-Milky Way collision is a predicted galaxy collision, due to take place in approximately three billion years time, between the two largest galaxies in the Local Group - the Milky Way and the Andromeda Galaxy. It is often used as an example of the kind of phenomena associated with such collisions in simulations.[1] As with all such collisions, it is unlikely that objects such as stars contained within each galaxy will actually collide, as galaxies are in fact very diffuse —the nearest star to the Sun is in fact almost thirty million solar diameters away from the Earth. If the theory is correct, the stars and gas contained in Andromeda will be visible to a naked-eye viewer (if one exists on Earth at the time) in approximately three billion years.[2]
Frank Summers of the Space Telescope Science Institute has created a CGI visualization of the predicted event, based on research by Professors Chris Mihos of Case Western Reserve University and Lars Hernquist of Harvard University.[3]
Such collisions are relatively common; Andromeda, for example, is believed to have collided with at least one other galaxy in the past.[4]