Q&A with Rolf de Groot, head of ESA’s robotic exploration office

Don’t miss riveting slow-motion video of Thursday’s blastoff of four European navigation satellite satellites captured by high-speed cameras at the Ariane 5 rocket’s jungle launch pad, plus dramatic up-close snapshots showing the launcher’s climb into the sky on 2.9 million pounds of ground-shaking thrust.

Two astronauts working outside the International Space Station Wednesday installed a European Space Agency data relay antenna and connected four of six cables to partially power a new ESA experiment platform. They also removed two solar array handling fixtures to clear the way for a future power system upgrade.

A European-built communications satellite, manufactured in secret for the Egyptian government, joined a European Space Agency exoplanet observatory aboard a Ukrainian Antonov An-124 cargo plane for a trans-Atlantic flight Wednesday to begin final launch preparations in French Guiana.