Australian Scientists studying at the International Centre for Radio Astronomy Research just found out something pretty cool. Turns out the Andromeda galaxy, which is our Milky Way's closest neighbour, is around the same size.

See we used to think Andromeda was up to three times larger than the Milky Way, and that one day it would engulf us entirely. Fun times! But we now have fodder for a rivalry that can continue for another few billion years or so.