Q&A with Michel Denis, ExoMars flight director

A Russian-built Soyuz booster arrived at its tropical launch pad in South America on Friday and was joined with a European weather satellite for launch Tuesday night.

Singed and blackened from three fiery trips to the edge of space and back, a Falcon 9 rocket returned to Cape Canaveral on Sunday after a mission last that week carried the Israeli Beresheet moon lander into orbit, ready for inspections before attempting a fourth — and likely final — launch this spring.

Europe’s Rosetta mission ended its 12-year mission Friday with a slow-speed belly-flop on comet 67P/Churyumov-Gerasimenko, concluding an interplanetary odyssey that gave humanity a first close-up introduction to a class of objects which has stimulated imaginations for millennia.