Q&A with Elon Musk, SpaceX’s founder and CEO

Rocket Lab said Tuesday it will push back the first commercial launch of its light-class Electron rocket from New Zealand by a few weeks to address a problem uncovered during a recent fueling test.

SpaceX’s Dragon cargo craft ended a four-week mission Sunday with a parachute-assisted splashdown in the Pacific Ocean, returning from the International Space Station with more than 3,600 pounds of cargo, blood and urine samples, and specimens from a rodent research experiment aimed at helping patients with catastrophic bone injuries and osteoporosis.

Viasat has modified an existing contract with Arianespace to launch one of the company’s next-generation broadband Internet satellites on Europe’s next-generation Ariane 6 rocket, rather than on-board an Ariane 5 launcher, officials announced Monday.