Rosetta's rendezvous with comet 67P/Churyumov–Gerasimenko back in August was a milestone in its own right, as was how the probe slipped right into orbit around it a month later. Now that Philae has cemented itself into the history books, though, it's time for testing. Lots of it. You see, this isn't the first time humanity has come into extremely close contact with a comet -- NASA used its Deep Impact probe (no relation to the awful movie) to smash what was essentially an 820-pound, camera-laden bullet into the nucleus of a comet called Tempel 1 in 2005. With an actual, operational spacecraft on the comet, we have a shot at learning even more about the origins of the solar system... not to mention how we all came to be.

The ESA has been receiving telemetry data from Philae since the moment it touched down, but we're all waiting for the first round of juicy stuff -- especially those initial panoramic and surface images -- to start making the rounds. In addition to that spacefaring photography, Philae will also measure the comet's magnetic field and gas emissions for about 60 hours before its bank of batteries runs down. And after that? It'll switch to a set of backup batteries that can be recharged by Philae's solar panels, which ESA engineers hope will last about four to five months before finally giving up the ghost. Once those cells have finally run dry, Philae will then continue to ride 67P as it careens on its six-year orbit around the solar system, another testament to human ingenuity and the curiosity that continually pushes us to cast our eyes toward the heavens.