A new study suggests that the comet that rambled past us from another star last year likely originated in a cold, isolated corner of the galaxy that had yet to gel into its own solar system. Astronomers reported the findings Thursday. Comet 3I/Atlas is only the third interstellar visitor to be confirmed and quite possibly the oldest. Discovered last summer, it’s now well past Jupiter on its way out of our solar system for good. A team led by the University of Michigan used an observatory in Chile to study the comet last fall. Findings were published in Nature Astronomy.