Experts have been hopeful, but say the agency’s lunar aspirations are largely at the whims of two billionaires, Elon Musk and Jeff Bezos.

NASA’s Artemis program has little room for error if it is to land astronauts on the moon by the end of 2028, but Blue Origin could be out of commission for at least a year.

Elon Musk’s rocket company, on the cusp of the largest initial public offering ever, will soon end up in index funds after rule changes by Nasdaq and other index providers.

Few are as delighted by the pending market debut as the vibrant community of space enthusiasts who want to push discovery of the final frontier.

Gwynne Shotwell, the president and chief operating officer, is the adult-in-the-room foil to Mr. Musk as SpaceX prepares for a blockbuster initial public offering.

Gwynne Shotwell, the president and chief operating officer, is the adult-in-the-room foil to Mr. Musk as SpaceX prepares for a blockbuster initial public offering.

The $135 share price means Elon Musk’s rocket maker is poised to exceed the 2019 initial public offering of Saudi Aramco in both valuation and money raised.

Jeff Bezos was gaining ground on Elon Musk’s SpaceX and Starlink. Thursday’s rocket explosion on a launchpad creates a major setback.

Jeff Bezos was gaining ground on Elon Musk’s SpaceX and Starlink. Thursday’s rocket explosion on a launchpad creates a major setback.

The rocket, built by the Jeff Bezos-owned space company, was to carry 48 satellites into space. Blue Origin reported on social media that “all personnel have been accounted for.”

The ways it set up its board and Mr. Musk’s pay appear to benefit him at the expense of other shareholders, corporate governance experts said.