Live coverage: Soyuz crew capsule departs station, lands in Kazakhstan

Europe is in the midst of launching the most thorough space-based environmental network ever deployed, with satellites to help officials respond to natural disasters, measure crop yield, monitor the health of oceans and ice caps, and track ozone in the atmosphere. Guido Levrini from ESA spoke to Spaceflight Now about the program on the eve of Sentinel 1B’s launch.

With three space station fliers heading home Sunday after a 168-day mission, three fresh crew members made final preparations for launch three days later to boost the lab’s crew back to six in a rapid-fire rotation that will prevent any major interruption of research activity.

A Russian cosmonaut, a NASA flight engineer and a Japanese physician-astronaut strapped into their Soyuz ferry ship early Sunday, undocked from the International Space Station and plunged back to Earth, landing on the steppe of Kazakhstan to close out a 168-day mission.