RT @SpaceflightNow: LIFTOFF of Europe’s #Gaia mission, a ‘discovery machine’ to put a billion stars on the map. spaceflightnow.com/soyuz/vs06/sta…
RT @SpaceflightNow: LIFTOFF of Europe’s #Gaia mission, a ‘discovery machine’ to put a billion stars on the map. spaceflightnow.com/soyuz/vs06/sta…