Nothing in our universe stands still: Earth orbits the sun, the sun circles the galaxy, and even galaxies are constantly on the move. So why is everything in space in motion? It all comes down to how ...

Used to be astronomers thought the Milky Way was all there was. Just one enormous galaxy filled with everything in space. American astronomer Edwin Hubble turned that view on its head, proving that ...

TOWARDS THE end of last year a pair of military satellites, one American and the other French, prepared for a delicate orbital minuet. They were about to conduct a so-called rendezvous and proximity ...