Butterfly Earth

ESA astronaut Alexander Gerst took this image of our planet during his six-month Blue Dot mission on the International Space Station. He wrote: "Amazing to see that weather is such a global phenomenon. So where was the butterfly?"

His mission is called Blue Dot after the American astronomer Carl Sagan's description of our faintly visible planet as “a pale blue dot” as seen on a photograph taken by NASA’s Voyager six billion kilometres from our planet.