VIDEO: Expedition 42-43 mission preview

A European supply freighter is set to undock from the International Space Station on Saturday, heading for a destructive dive into Earth’s atmosphere about 30 hours later after a power system failure forced the cancellation of an experiment to observe the dynamics of the re-entry of a large spacecraft.

International Space Station managers Friday cleared astronauts Barry “Butch” Wilmore and Terry Virts to proceed with a third spacewalk Sunday, as originally planned, after concluding a small amount of water in Virts’ space helmet after an EVA Wednesday was an understood condition and not a threat to crew safety.

Astronauts Butch Wilmore and Terry Virts suited up and ventured outside the International Space Station on Sunday on their third spacewalk in eight days to install equipment to help future commercial crew capsules built by Boeing and SpaceX navigate to the complex.