The Moon has a long history of being smacked by large rocks. Its pock-marked, cratered surface is evidence of that. Scientists expect that, as part of those impacts, some debris

Mars’ water disappeared somewhere, but scientists have been disagreeing for years about where exactly it went. Data from rovers like Perseverance and Curiosity, along with orbiting satellites such as the

Why are planets rarely found orbiting a pair of stars? UC Berkeley and American University of Beirut physicists find that general relativity makes the orbit of a tight binary pair