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Astronomy picture of the day - comet Churyumov Gerasimenko in Crescent

67P Churyumov-Gerasimenko

The Cliffs of Churyumov-Gerasimenko

Cantís no núcleo escuro do cometa Churyumov–Gerasimenko fotografados pola nave Rosetta

Astronomy picture of the day - into the void

Ares 3 Landing Site: The Martian Revisited