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

Topped with Brazilian and Japanese television broadcasting satellites, an Ariane 5 rocket rolled out to its launch pad in French Guiana on Tuesday, a day before its scheduled blastoff on the way to geostationary transfer orbit.

The U.S. Air Force has released an infrared video and additional images from Sunday’s landing of the military’s X-37B spaceplane in Florida after a top secret mission that lasted more than two years.

America’s most experienced astronaut says her fully commercial visit to the International Space Station this week is a critical stepping stone on the road to space tourism, private-sector orbital research and development of commercially operated space stations.