It's a busy week for space enthusiasts (have you spotted Comet Tsuchinshan-ATLAS?). The long-anticipated Europa Clipper mission is officially underway. The craft launched Monday morning on a Falcon Heavy rocket, bound for that most beguiling of icy Jupiter moons, Europa. It will arrive at its destination in 2030 (!?! We seriously need faster spacecraft engines pronto - or engines that use much less fuel, thus are able to take more fuel and travel faster....)

Once there, Europa Clipper will hunt for organic chemicals on the icy surface, as well as other signs of a habitable environment and evidence for the ingredients of life. It will also characterize Europa's ice shell in detail. This work could identify good spots at which a life-hunting lander could touch down and operate - BUT IT WILL ATTEMPT NO LANDING THERE.

...not yet.