NASA’s Artemis II mission, the next crewed trip around the Moon, may face another delay due to technical issues with its liquid hydrogen fuel system. The historic mission will carry four astronauts, ...

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 ...

China’s push to match the world’s leading space powers hit a dramatic setback when a private rocket company failed to bring back the first stage of a reusable launcher after a high‑stakes debut flight ...

WASHINGTON, Nov 21 (Reuters) - A towering first-stage booster for an upgraded version of SpaceX's Starship rocket suffered a predawn testing failure in Texas on Friday, potentially complicating the ...