Where do comets come from?
Some swing by often. Others take millions of years—or just once.Comets: Origins from the Kuiper Belt and Oort Cloud
Two far-off reservoirs
Short‑period comets come from the Kuiper belt and scattered disc. Long‑period comets fall inward from the Oort cloud after nudges by passing stars and the galactic tide.Comets: Origins from the Kuiper Belt and Oort Cloud
