This entry is missing Overview , add relevant content to make the entry more complete, and it can also be upgraded quickly. Hurry up edit Come on! Oort cloud theory believes that the spherical structure located at the periphery of the solar system, about 50000 AU away from the sun, is mainly composed of ice balls and may be the source of long-period comets.
- Chinese name
- Oort cloud theory
- Foreign name
- Oort cloud theory
