Elon Musk’s SpaceX dominates the news these days, but a host of oddballs involved in space exploration came before him.

This new propulsion system could rewrite the rules of spaceflight—not to mention completely defy conventional physics.

A lawsuit blaming the feud between the world’s two richest men for costly delays plaguing Amazon.com Inc.'s space satellite ...

"It is likely to be in the timeframe of late this calendar year or early next year for the next Starliner flight." ...

A German startup named Isar Aerospace will try to launch its first rocket Saturday, aiming to become the first in a wave of ...

This is what Mr Musk said he wanted to do last year. Then it seemed barely plausible. Today it looks next to impossible. Mr ...

Elon Musk has benefited from his close alliance with Donald Trump, as the president has ousted federal officials who had ...

There are no customer satellites aboard the first Spectrum test flight. The rocket will climb into a polar orbit from Andøya ...

A look back at all of the spectacular tests — and failures — that have punctuated SpaceX's development of its Starship rocket ...

Unlike Apollo—which used a single spacecraft comprising a mothership and lunar lander—Artemis III will see Orion dock with ...

Jed McCaleb, the same guy who created XRP and started Mt. Gox, is now paying out of pocket to get a private space station ...

Mr. Irving is an investigative journalist who has covered aviation and aerospace for more than 30 years.