The robot probe Philae was able to land on Comet 67P/Churyumov-Gerasimenkoon November 12, 2014 after traveling since 2004 with the Rosetta spacecraft. The lander awkwardly bounced two times before it could land the third time, with the first re­bound lasting two hours and the second lasting seven minutes. The several rebounds were a result of the cold gas system failing to work. In addition, there were two major­drawbacks for Philae to overcome before it could accomplish the key goal of the mis­sion, which was to use the lander’s drill to obtain material from beneath the surface of the comet. The first drawback was that Philae landed on two legs instead of the envisioned three, making its positioning askew and its stabil­ity weak. The odd position, scientists say, may be the result of Philae landing on the rim of comet’s crater. The lander will need to use its drill in order to collect sub-surface material from the comet, but the force of the drill could send Philae off of its balance because it is not secured to the comet by a harpoon. This is why the scientists are finding other alternative strategies.

The second drawback is the battery life of Phi­lae. There is not enough light hitting Philae because it receives only one and a half hours of light during the comet’s twelve hour rotation. Without light on its solar panels, the lander’s battery life is around sixty hours. Time is of the essence, as the battery does have an ex­piration date. Regardless, the landing of Philae is the first time in history for scientists to success­fully soft land a probe onto a moving comet, which will lead to a further increase of our understanding of these icy rock giants. Be­fore, scientists could only observe from a distance. The probe will also be the first to take images of a comet’s surface, as well as the first to do on-site analysis of a comet’s composition. This milestone is bound to make a mark in the field of science.