Live coverage: Chinese sample return spacecraft completes docking in lunar orbit

A rocket engine that could power United Launch Alliance’s next-generation rocket has passed a major design review, clearing the way for full-scale hotfire testing starting next year and certification for test flights in 2019, according to Aerojet Rocketdyne, the powerplant’s developer.

NASA officials gave approval Tuesday for SpaceX to begin regular crew rotation flights to the International Space Station with the launch of four astronauts set for Saturday from the Kennedy Space Center in Florida, signaling a transition from development to operations for the human-rated Dragon spacecraft.

House lawmakers this week proposed to fund NASA’s human-rated lunar lander development program at less than one-fifth of the level the Trump administration wanted, but NASA Administrator Jim Bridenstine said Wednesday the House budget bill is just the “opening salvo” in an appropriations process that now goes to the Senate.