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  2. Oort cloud - Wikipedia

    en.wikipedia.org/wiki/Oort_cloud

    The Oort cloud (/ ɔːr t, ʊər t /), [1] sometimes called the Öpik–Oort cloud, [2] is theorized to be a vast cloud of icy planetesimals surrounding the Sun at distances ranging from 2,000 to 200,000 AU (0.03 to 3.2 light-years). [3] [note 1] [4] The concept of such a cloud was proposed in 1950 by the Dutch astronomer Jan Oort, in whose ...

  3. Portal:Solar System/Selected article/9 - Wikipedia

    en.wikipedia.org/wiki/Portal:Solar_System/...

    The Oort cloud (/ ɔːr t, ʊər t /), sometimes called the Öpik–Oort cloud, is theorized to be a vast cloud of icy planetesimals surrounding the Sun at distances ranging from 2,000 to 200,000 AU (0.03 to 3.2 light-years). The concept of such a cloud was proposed in 1950 by the Dutch astronomer Jan Oort, in whose honor the

  4. Portal:Outer space/Selected article/40 - Wikipedia

    en.wikipedia.org/wiki/Portal:Outer_space/...

    The Oort cloud (artist's rendering pictured) is a hypothesized spherical cloud of comets that may lie nearly a light-year from the Sun. It is thought to comprise two separate regions: a spherical outer Oort cloud and a disc-shaped inner Oort cloud, or Hills cloud; the outer extent of the cloud defines the boundary of the Solar System.

  5. Wikipedia:Today's featured article/August 8, 2011 - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Today's_featured...

    The Oort cloud is a hypothesized spherical cloud of comets that may lie nearly a light-year from the Sun. It is thought to comprise two separate regions: a spherical outer Oort cloud and a disc-shaped inner Oort cloud, or Hills cloud; the outer extent of the cloud defines the boundary of the Solar System.

  6. List of Solar System objects - Wikipedia

    en.wikipedia.org/wiki/List_of_Solar_System_objects

    2012 VP 113 (possibly inner Oort cloud) Sedna, a dwarf planet (possibly inner Oort cloud) Oort cloud (hypothetical) Hills cloud/inner Oort cloud; Outer Oort cloud; The Solar System also contains: Comets. List of periodic comets; List of near-parabolic comets; Small objects, including: Meteoroids; Interplanetary dust. Helium focusing cone ...

  7. Category:Oort cloud - Wikipedia

    en.wikipedia.org/wiki/Category:Oort_cloud

    Numerous such comets have been observed when close to the Sun. The closer an object is to the Sun the faster it needs to move to maintain the orbit. Objects move slowest when furthest from the Sun (aphelion) and fastest when closest to the Sun (perihelion) and this is why Oort cloud comets spend most of their time in the Oort cloud.

  8. List of trans-Neptunian objects - Wikipedia

    en.wikipedia.org/wiki/List_of_trans-Neptunian...

    The Kuiper belt, scattered disk, and Oort cloud are three conventional divisions of this volume of space. [1] [nb 1] As of February 2024, the catalog of minor planets contains 1060 numbered TNOs. In addition, there are more than 3,500 unnumbered TNOs, which have been observed since 1993. [3] [4] [5] [6]

  9. Dust astronomy - Wikipedia

    en.wikipedia.org/wiki/Dust_astronomy

    The hypothesized Oort cloud is thought to be a spherical cloud of icy bodies extending from outside the Kuiper belt and the scattered disk to halfway to the nearest star. During planet formation interactions of protoplanetary disk objects with the already developed Jupiter and Neptune resulted in the scattered disc and the Oort cloud. [86]