Astronomers have used the Hubble Space Telescope to work out when precisely our Milky Way Galaxy will crash into its neighbour, Andromeda.
The pair are being pulled together by their mutual gravity and the scientists expect them to begin to merge in about four billion years' time.
A further two billion years on and they will appear as a single entity.
Our Sun's position will be disturbed but the star and its planets are in little danger of being destroyed.
http://www.bbc.co.uk...onment-18285583
The SPACE.com story:
http://www.space.com/15949-milkyway-galaxy-crash-andromeda-hubble.html