Q&A with Greg Wyler, founder and chairman of OneWeb (members only)

The European Space Agency has cinched an agreement with Arianespace for the October 2018 launch of the James Webb Space Telescope aboard an Ariane 5 rocket, which will dispatch the nearly $10 billion observatory on a bold mission that promises to rewrite astronomy textbooks.

Two U.S.-German satellites launched more than 15 years ago to measure Earth’s changing gravity field will stop collecting data in November, a few months before a pair of replacement craft will launch to resume gravity measurements, NASA officials said.

SpaceX test-fired a Falcon Heavy rocket Wednesday night at the Kennedy Space Center in preparation for launch June 24 with a stack of weather observation and technology demonstration satellites.