A European Ariane 5 rocket lifts off from the Guiana Space Center with the Juicy Icy Moons Explorer mission. Credit: ESA/CNES/Arianespace/JM Guillon
An Ariane 5 rocket took off from French Guiana Friday with the heaviest interplanetary science probe ever launched, kicking off a $1.7 billion European Space Agency mission on a decade-long quest to Jupiter’s icy moons in search of environments that could be habitable for life.