Rosetta And Philae Lander at Comet 67P/C-G

67p 67p/c g 67p/churyumov gerasimenko astronomy celestial body churyumov gerasimenko comet 67p comet nucleus comet deep sky deep space deploy esa european space agency lander landing site landing navcam orbiter philae lander philae rosetta mission rosetta orbiter rosetta science space exploration space probe space spacecraft study surface