Watch how the Space Launch System rocket RS-25 undergoes a core stage engine test-fire. Credit: NASA's Stennis Space Center ...

General Atomic's new nuclear fuel was subjected to the maximum heat of a reactor for 20 minutes in the latest tests.

For the past week, an uncrewed lunar lander has been journeying through outer space on a 60-day mission to the moon on behalf ...

The company, started by the Amazon founder Jeff Bezos, reset its countdown clock repeatedly over a period of just over two ...

Blue Origin successfully launched the rocket after an attempt earlier in the week was scrubbed. The flight is a crucial test ...

Blue Origin, the rocket company Amazon billionaire Jeff Bezos founded, notched one of the most substantial successes in its ...

Shrugging off bad weather, Jeff Bezos' Blue Origin launched its powerful New Glenn rocket on its maiden flight early Thursday ...

Blue Origin, founded by billionaire Jeff Bezos, is counting on launch vehicles like New Glenn as it pursues commercial and ...

Starship experienced a "rapid unscheduled disassembly," which is a phrase SpaceX coined to describe an explosion.

Telemetry from the Starship froze just more than 8 minutes after launch from Texas, moments after engines began shutting down.

Reusable rockets, pioneered by Elon Musk's SpaceX, have demonstrated that they bring down costs for launch vehicles and space transportation. With mega constellations for satellite communications, ...

which would carry them to orbit and rendezvous with yet another rocket for return to Earth, where yet another lander would return the samples to NASA and the European Space Agency for study.