UK London -- 23 Feb 2016 -- British ESA astronaut Tim Peake sent this remarkable image of an aurora (the hemisphere is not specified) that he took from the orbiting International Space Station on Tuesday 23 Feb 2016 as the ISS flew through an aurora during his six month Principia mission. The astronaut said: "The ISS just passed straight through a thick green fog of aurora…eerie but very beautiful," -- Picture by Tim Peake/Atlas Photo Archive/NASA/ESA