RT @BBCWorld: How big is the #Rosetta spacecraft compared with comet 67P? bbc.in/1kmM40c #bbcgofigure http://t.co/FJpAXAtjdx
RT @BBCWorld: How big is the #Rosetta spacecraft compared with comet 67P? bbc.in/1kmM40c #bbcgofigure http://t.co/FJpAXAtjdx