To Jupiter!

摘要

NASA's Juno spacecraft launched successfully on 5 August, bound for Jupiter. The US$1.1-billion mission will take five years to reach the Solar System's largest planet, which it will swing round 33 times in a highly elliptical orbit. Juno will probe the Jovian atmosphere for water vapour, and look for signs of a solid core (see Nature 476,13-14; 2011).