Alien planet HD 189733 b might look like a lovely blue world – but it's far from cosyCredit: Nasa/ESO/M. Kornmesser That's around seven times the speed of sound, Nasa explains. It's called HD ...

this far-off planet looks bright blue. But any space traveller confusing it with the friendly skies of Earth would be badly mistaken. “The weather on this world is deadly." HD 189733 b is a ...