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

The last Delta 4-Medium rocket lifted off from Cape Canaveral Thursday with a GPS navigation satellite for the U.S. Air Force.

Europe’s ExoMars Trace Gas Orbiter and Schiaparelli lander arrived at Mars Wednesday, with the orbiter safely captured by Martian gravity after a critical engine firing. The lander’s fate is unknown after mission control lost contact just before touchdown.

Mitsubishi Heavy Industries transferred an H-2A rocket to its launch pad at the Tanegashima Space Center in Japan on Sunday, ready to commence a final countdown before liftoff with the Hope Mars mission for the United Arab Emirates.