The emission of X-rays is usually the domain of the energetic events of the universe: hot stars, supermassive black holes, and the like. However, since 1996, with Comet Hyakutake, we have learned that ...

The interstellar comet 3I/ATLAS has just done something no visitor from another star system has ever been caught doing: it lit up in X-rays. As its elongated orbit carries it through the inner solar ...