Japan’s H3 rocket suffered engine trouble on December 22, 2025, and failed to place a Japanese navigation satellite into ...

How do you control a nuclear space propulsion system? Very carefully. To help with this, the Oak Ridge National Laboratory (ORNL) has built a simulated nuclear reactor test bed to develop the engines ...

A Texas-based startup just made aviation history. The company completed the first U.S. flight test of a next-generation rocket engine that could be transformational for both hypersonic weaponry and ...