Q&A with Michel Denis, ExoMars flight director

Launch of a SpaceX Crew Dragon capsule carrying four astronauts to the International Space Station has been delayed 24 hours to Friday because of bad weather in the Atlantic Ocean where the crew could be forced to ditch in an emergency, NASA announced Wednesday.

Europe’s Galileo navigation program turned to the workhorse Ariane 5 rocket for a heavy lift Thursday, delivering four new satellites to orbit on the launcher’s 75th successful flight in a row and pushing the growing fleet closer to global coverage.

Europe’s fifth and final Automated Transfer Vehicle departed the International Space Station for the last time Saturday, closing out one of the European Space Agency’s flagship programs as the bus-sized spaceship heads for a destructive re-entry Sunday.