rosetta-comet-landing-probe-140730a.jpg
1) This isn't Rosetta's first cosmic rodeo
2) Rosetta traveled 4 billion miles to Comet 67P/C-G
3) Rosetta will drop a lander on the comet
4) Comet 67P/C-G is as big as a mountain
5) Rosetta's comet is dark and dusty

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