First paragraph: The landing of Rosetta’s Philae on comet 67P/Churyumov–Gerasimenko was a triumph of engineering. Many spectacular scientific firsts will follow now, but small glitches during the landing make it more difficult to obtain all of the scientific goals. Access this article on The Conversation website: https://theconversation.com/small-glitches-but-rosetta-comet-mission-is-achieving-major-scientific-goals-3422