The rehearsal is critical to launch Artemis II, the first crewed mission to the moon in over 50 years. By running a realistic ...

The United States flew a reactor in space in the 1960s and has studied nuclear thermal propulsion for decades. Fuel is not the primary limitation either; the enriched uranium supply chain is ...

A former SpaceX engineer says he has solved the long-standing engineering problems that have kept water-based rocket ...

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A United Launch Alliance Vulcan rocket carrying classified Space Force payloads suffered a booster problem but apparently made an otherwise "nominal" ascent to space, the company said.

Oil rose amid lingering U.S.-Iran tensions that could lead to supply disruptions. The Pentagon has ordered a second aircraft ...