I’ve grown up with rockets that burn chemical fuel, but NASA’s next big leap in propulsion could make those engines look as dated as steam trains. By turning to nuclear power in space, the agency is ...

GE and Lockheed ground tested a new air-breathing hypersonic jet engine capable of powering missiles to speeds well in excess ...

Japan’s flagship H3 rocket has suffered a fresh setback, with an engine failure in its upper stage cutting short a high‑stakes mission and leaving a navigation satellite stranded short of orbit. The ...