RT @FireballsSky: #Rosetta mission to end w controlled descent #67P comet’s surface on 30.09.16 Job well done! buff.ly/2a9WaD9 https://t.co/HJHTjHgw5q
RT @FireballsSky: #Rosetta mission to end w controlled descent #67P comet’s surface on 30.09.16 Job well done! buff.ly/2a9WaD9 https://t.co/HJHTjHgw5q