SpaceHunting for scraps from galactic cannibal feasts Tidal streams – torn-up remains of other galaxies – were first found around the Milky Way. Now astronomers aim to see how common they are elsewhere ¿ìè¶ÌÊÓÆµ
SpaceHappy birthday, Hubble – is your best yet to come? Twenty years after the telescope entered orbit, ¿ìè¶ÌÊÓÆµ recalls the lows and highs of its career – and predicts revelations in its third decade Books & Arts