When galaxies collide, coming to the night sky in four billion years

4 June 2012

Several billion years hence our galaxy, the Milky Way, will collide with galactic neighbour Andromeda, and form a new entity some are calling Milkomeda. This NASA image depicts key steps in the process, and if nothing else will transform the night sky into a visual spectacle.

Not that anyone will probably be around to think about it anyway, but the night sky will have far less appeal once the merger is complete. The bright white haze (in the last frame) that will eventually take the place of the Milky Way (first frame) looks a little bland to me.

Via NASA Science.

Originally published Monday 4 June 2012.