Q&A with Elon Musk, founder and CEO of SpaceX (members only)

Managers have pushed back the next flight of United Launch Alliance’s Delta 4-Heavy rocket from a launch pad in California until no sooner than early December, and the first launch of SpaceX’s Falcon Heavy for the U.S. Air Force has likely been delayed to some time early next year, officials said this week.

Aiming for reusability, Rocket Lab has demonstrated the mid-air recovery of a booster test article in a key test before rigging the first stage of the company’s Electron launcher with a parachute on missions beginning later this year.

Riding on a mobile launch platform, an Ariane 5 rocket made the 1.7-mile trip from its final assembly building to the ELA-3 launch zone in Kourou, French Guiana, on Monday morning, one day before its blastoff on a commercial mission with Australian and Indian communications satellites.