Video: Marc Buie, New Horizons Occultation Team Lead (members only)

U.S. spacewalk 94 was slated to have NASA astronauts Mike Fincke and Zena Cardman perform a variety of operations around the orbiting outpost during the roughly 6.5-hour-long event. A new date for the spacewalk hasn’t been announced.

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.

A senior NASA official said Monday the agency could select two new robotic planetary science missions next year for launch in the early 2020s, and the five finalists favor Venus and asteroid research.