SpaceAstrophile: Searing hot exoplanet is an unearthly blue "Planet HD 189733b is blue, and there's nothing I can do" – not quite the David Bowie lyric, but it sums up the first exoplanet to have its colour studied News
SpaceOld Mars rover digs up evidence for drinkable water NASA's Opportunity rover has found ancient aluminium-rich clays, which require neutral water to form, on the rim of Endeavour crater News