Q&A with Anton Zeilinger, acclaimed quantum physicist

A new four-stage rocket operated by the Chinese launch company Galactic Energy succeeded on its inaugural flight Saturday, delivering a data relay microsatellite to an orbit 300 miles above Earth.

Elon Musk, SpaceX’s founder and chief executive, spoke with reporters via conference call May 15 as the company prepared for the launch of the first 60 satellites to build out a network of potentially thousands of broadband relay stations in low Earth orbit providing high-speed Internet to consumers around the world.

A solid-fueled Chinese Kuaizhou launcher positioned to compete for worldwide business took off Monday on its first commercial mission with three small satellites to collect high-definition video and test communications technologies.