Astronauts leave space station for third spacewalk
NASA Commander Barry Wilmore and Flight Engineer Terry Virts perform their third spacewalk in eight days outside the International Space Station.
In this handout photo provided by the European Space Agency (ESA), German ESA astronaut Alexander Gerst takes a photo during his spacewalk, whilst aboard the International Space Station (ISS) on October 7, 2014 in Space. Gerst returned to earth on November 10, 2014 after spending six months on the International Space Station completing an extensive scientific programme, known as the 'Blue Dot' mission (after astronomer Carl Sagan's description of Earth, as seen on a photograph taken by the Voyager probe from six billion kilometres away). (Getty Images)