Q&A with Dan Hart, president and CEO of Virgin Orbit (members only)

A Russian-built Soyuz booster arrived at its tropical launch pad in South America on Friday and was joined with a European weather satellite for launch Tuesday night.

Follow the key events of the Falcon 9 rocket’s ascent to orbit with five more Iridium Next communications satellite and the U.S.-German GRACE-Follow On climate research mission.

SpaceX launched its Falcon 9 rocket at 2 a.m. EDT (0600 GMT) Thursday, two days after high winds prevented liftoff. The nearly 23-story booster carried the EchoStar 23 communications satellite into orbit from NASA’s Kennedy Space Center in Florida to provide broadcast television programming across Brazil.