JUICE RIME antenna
The antenna for JUICE's RIME instrument in its stowed configuration shortly after launch. The antenna, 16 meters long, had not fully deployed two weeks after launch. Credit: ESA

WASHINGTON — A radar antenna on a European mission to Jupiter has yet to fully deploy after launch, although project officials say they still have plenty of options to fix the problem.

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Jeff Foust writes about space policy, commercial space, and related topics for SpaceNews. He earned a Ph.D. in planetary sciences from the Massachusetts Institute of Technology and a bachelor’s degree with honors in geophysics and planetary science...