Q&A with Keith Gendreau, principal investigator of the first X-ray space communications experiment (members only)

Two veteran cosmonauts ventured outside the International Space Station Wednesday, swapped out materials science space exposure samples, installed handrails needed for future spacewalks and tested an applicator and thin-film coatings that could prove useful reconditioning aged or damaged hull panels.

SpaceX’s Falcon 9 rocket was poised for launch Wednesday at Cape Canaveral’s Complex 40 launch pad carrying more than 5,600 pounds of supplies and experiments to the International Space Station.

The robotic lander reached the Moon’s orbit after performing its 4 minute and 15 second Lunar Orbit Insertion burn, which began at 8:51 p.m. EST on Feb. 13 (0151 UTC on Feb. 14).