Q&A with Scott Bolton, principal investigator on NASA’s Juno mission

SpaceX test-fired a Falcon 9 rocket at Cape Canaveral on Saturday evening, clearing the way for a delayed liftoff with the Israeli-owned Amos 17 commercial communications satellite as soon as Tuesday, assuming SpaceX can work its way into a busy schedule before a previously-planned Atlas 5 launch this week on the U.S. Air Force’s Eastern Range.

The skeleton of NASA’s next Orion capsule, set for launch in late 2018 on a test flight to lunar orbit without astronauts, has passed a pressurization test at the Kennedy Space Center in Florida.

After walking away from a previously planned joint mission to Jupiter, NASA has asked the European Space Agency if it can furnish a lander or ice-penetrating probe for a rejuvenated U.S.-led robotic spacecraft to visit Jupiter’s moon Europa.