RT @NASAJPL: One gnarly-looking comet, one fantastic science destination. Congrats @ESA_Rosetta, now in orbit around #67P! http://t.co/HBs…
RT @NASAJPL: One gnarly-looking comet, one fantastic science destination. Congrats @ESA_Rosetta, now in orbit around #67P! http://t.co/HBs…