One of Elon Musk’s companies, SpaceX, recently acquired another of his companies, xAI. SpaceX is now the world’s largest ...

NPR's Ailsa Chang speaks to astronomer Sarah Greenstreet about her team's new discovery of the fastest-spinning large asteroid known to man. Forget world records because astronomers recently announced ...

Meteoritics is the study of meteorites — solid parts of asteroids or comets that have landed on another celestial body, notably (but not limited to) the Earth. Measuring the composition of meteorites ...