After traveling for more than ten years and four billion miles, Rosetta became the first spacecraft in history to rendezvous with a comet. But, it some ways, the spacecraft's work has only just begun. One of the next challenges will be selecting a safe spot for Rosetta's lander, Philae.
Over the next few months, Rosetta's corkscrew orbit will bring it even closer to 67P/Churyumov–Gerasimenko, trimming its distance from the current 60 miles down to 30 miles and then 18 miles. In the meantime, scientists will use the observations to scout for potential landing sites.