Q&A with Eric Smith, JWST program director

An uncrewed spacecraft landed in China’s Inner Mongolia region Monday after nearly 13 days in orbit carrying an array of microgravity research experiments, including a groundbreaking investigation that showed mammal embryos can develop in space, Chinese state media reported.

Just before settling to a soft crash landing Friday, the European Space Agency’s Rosetta spacecraft captured close-range images of comet 67P/Churyumov-Gerasimenko, peering into a stadium-sized pit and recording a final dataset to keep scientists busy long after the mission’s end.

A team of United Launch Alliance and NASA engineers worked through Delta 2 launch day fueling procedures during a simulated countdown Wednesday for what should be the second-to-last time before the venerable rocket’s final liftoff next month from California’s Central Coast.