Interstellar comet 3I/ATLAS reveals secrets from distant star system

From the frozen outer reaches of a distant star system, an ancient wanderer named 3I/ATLAS has crossed the interstellar void and arrived in our cosmic neighborhood, carrying within its icy body a chemical record of worlds we have never seen. Astronomers have read its composition — rich in methanol and volatile ices — as a direct message about the cold, formative zones where planets are born around other stars. In a field long dependent on theory and inference, this comet offers something rarer: a physical sample of another star system's history, delivered across light-years and billions of yea