• Comet again? Cinzia Fantinati is the German Aerospace Centre’s operations manager for the comet lander, Philae (27 June, p 25). The European Space Agency controls the Rosetta mothership.
• Our focus may have slipped in our illustration of the orbits of Pluto and other planets (13 June, p 30). The sun should have been more clearly at one of the foci of each of the elliptical orbits; and in each orbit Pluto comes inside the orbit of Neptune only once.
