I'm thrilled to hear the Rosetta mission team have chosen a landing site on comet 67P/Churyumov-Gerasimenko. They plan to land a small robot on the 4-km-wide rubber-duck-shaped comet in a location known as 'J'. The robot - called Philae - will be jettisoned from the larger Rosetta probe at a distance of 10 km.
A successful landing needs both careful planning and luck: the comet is a perilous surface with towering cliffs and depressions. Let's hope it all goes smoothly for this space first - we haven't got long to go!