On 12th November 2014, after a 10 year journey, the Rosetta spacecraft's lander Philae touched down on the surface of the comet 67P, also known as Churyumov–Gerasimenko. The robotic European Space Agency lander not only took images from the comet’s surface, the first images in history, but obtained data that was sent back to be analysed. This data will be used to determine the composition of the surface of the comet. But what does this mean? And what implications does it have?