Q&A with Rolf de Groot, head of ESA’s robotic exploration office

Fresh off a 64-day test flight to the International Space Station with astronauts Doug Hurley and Bob Behnken, SpaceX’s first human-rated Crew Dragon spaceship is back at Cape Canaveral for inspections, refurbishment and upgrades before flying to the station again with a four-person crew next spring.

NASA officials said Thursday the launch of the James Webb Space Telescope will be delayed seven months to Oct. 31, 2021, a schedule slip that takes into account work slowdowns caused by the coronavirus pandemic and the amount of testing required on the observatory before its shipment to French Guiana for liftoff on a European Ariane 5 rocket.

Europe’s Rosetta spacecraft closed out a historic 4.9-billion-mile journey Friday with a slow-speed crash into the nucleus of comet 67P/Churyumov-Gerasimenko, the tiny world it has studied for the last two years, capturing some of the mission’s best science data to help unravel the inner workings of the comet. Confirmation of the crash landing arrived on Earth at 1119 GMT (7:19 a.m. EDT).