One of our universe's biggest stars has dramatically turned into a rare, yellow 'hypergiant' star, and astronomers aren't sure when it will go supernova.
The U.S. Space Force is putting an indefinite halt on all national security missions aboard United Launch Alliance's Vulcan Centaur, following a repeat anomaly with the rocket's side boosters.
NASA has replaced two bigwigs in its human spaceflight program, just a week after releasing a report criticizing how the agency handled the first crewed flight of Boeing's Starliner astronaut taxi.