Comet 67P/Churyumov-Gerasimenko

67 aphelion apogee asteroid asteroids astronomy Churyumov coma comet comets Comet 67P cosmology cosmos ecliptic ESA galaxies Galaxy Gerasimenko meteor Meteorite meteoroid meteors model nasa Orbit orbits outer p perigee perihelion planet planets rock rocks rosetta science solar solar system space star stars stone stones sun system universe 67 aphelion apogee asteroid asteroids astronomy Churyumov coma comet comets Comet 67P cosmology cosmos ecliptic ESA galaxies Galaxy Gerasimenko meteor Meteorite meteoroid meteors model nasa Orbit orbits outer p perigee perihelion planet planets rock rocks rosetta science solar solar system space star stars stone stones sun system universe