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Oort Cloud:
Vast, nearly spherical swarm of comets and icy planetesimals (small planets) dating from the origin of the solar system and orbiting the Sun in all directions. The existence of the cloud is hypothetical. It has never been directly observed. Dutch astronomer Jan Hendrik Oort postulated its existence in 1950 and proposed that it was the source of long-period comets (comets that take 200 years or more to orbit the Sun).
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Oort cloud
- collection of comets: a huge, roughly spherical, orbiting collection of comets thought to exist at the edge of the solar system
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  • Oort cloud - Wikipedia, the free encyclopedia

    The Oort cloud (pronounced /ˈɔrt/ ort, alternatively the Öpik-Oort Cloud IPA: ) is a hypothetical spherical cloud of comets believed to lie roughly 50,000 AU, or nearly a light ...

  • Oort-Cloud | Write - Share - Read - Respond

    The Future of Science Fiction and Fantasy Publishing "...authors create and distribute their work, and readers, individually and collectively, including fans as well as editors and ...

  • Contact | Oort-Cloud

    Oort-Cloud needs your feedback in order to keep things running smoothly and to add new features. Let us know what you think!

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