Jan Hendrik Oort

Dutch astronomer (1900–1992)
Person human Q309861
Jan Hendrik Oort
Joop van Bilsen · Public Domain · Wikimedia
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Summary

Jan Hendrik Oort was born on April 28, 1900[1], in Franeker[2]. He died on November 5, 1992[3], in Leiden[4]. He worked as an astronomer[5], physicist[6], and university teacher[7]. He ranks in the top 0.72% of human entities by monthly Wikipedia readership (683 views/month, #7,200 of 1,000,298).[8]

Key Facts

  • Date of birth: January 1, 1900[9]
  • Date of death: January 1, 1992[10]
  • Country of citizenship: Kingdom of the Netherlands[11]
  • Native language: Dutch[12]
  • Field of work: astronomy[13], radio astronomy[14]
  • Employer: Leiden University[15]
  • Educated at: University of Groningen[16]
  • Doctoral advisor: Pieter Johannes van Rhijn[17]
  • Award received: Bruce Medal[18], Gold Medal of the Royal Astronomical Society[19], Janssen Medal[20], Prix Jules Janssen[21], Henry Norris Russell Lectureship[22], Foreign Member of the Royal Society[23], De Gouden Ganzenveer[24], honorary doctor of the University of Bordeaux[25], Vetlesen Prize[26], Karl G. Jansky Lectureship[27], Karl Schwarzschild Medal[28], Balzan Prize[29], Kyoto Prize in Basic Sciences[30]
  • Member of: Royal Society[31], Academy of Sciences of the USSR[32], Royal Swedish Academy of Sciences[33], Royal Netherlands Academy of Arts and Sciences[34], Pontifical Academy of Sciences[35], American Academy of Arts and Sciences[36], Russian Academy of Sciences[37], German Academy of Sciences Leopoldina[38], International Astronomical Union[39], National Academy of Sciences[40], Koninklijke Vlaamse Academie van België voor Wetenschappen en Kunsten[41], Göttingen Academy of Sciences and Humanities in Lower Saxony[42], American Philosophical Society[43], Accademia Nazionale dei Lincei[44]
  • Sex or gender: male[45]
  • Doctoral student: Maarten Schmidt[46], Lodewijk Woltjer[47], Cornelis Johannes van Houten[48], Vincent Icke[49], Pieter van der Kruit[50], William Butler Burton[51], Leendert Binnendijk[52], William Whitney Shane[53], Gijsbert van Herk[54], Adrianus Jan Jasper van Woerkom[55], Elly M. Berkhuijsen[56], Adrianus N. Hulsbosch[57], Jeannette Kate Merkelijn[58], Ernst Raimond[59]
  • Commons category: Jan Hendrik Oort[60]
  • Family name: Oort[61]

Body

Works and Contributions

Things named for Jan Hendrik Oort include Oort cloud[62], a trans-Neptunian object[63]; Oort constants[64]; and 1691 Oort[65].

Why It Matters

Jan Hendrik Oort has Wikipedia articles in 29 language editions, a strong signal of global cultural recognition.[66] He is known by 68 alternative names across languages and contexts.[67]

He is credited with the discovery of Oort cloud[68], a trans-Neptunian object[69]. Entities named for him include Oort cloud[62], a trans-Neptunian object[63]; Oort constants[64]; and 1691 Oort[65].

His notable doctoral advisees include Maarten Schmidt[70], an astronomer[71], 1929–2022[72], of Kingdom of the Netherlands[73], awarded the Kavli Prize in Astrophysics[74]; Cornelis Johannes van Houten[75], an astronomer[76], 1920–2002[77], of Kingdom of the Netherlands[78], specialised in astronomy[79]; and Lodewijk Woltjer[80], an astronomer[81], 1930–2019[82], of Kingdom of the Netherlands[83], awarded the Karl Schwarzschild Medal[84].

FAQs

Where was Jan Hendrik Oort born?

Jan Hendrik Oort was born in Franeker[2].

Where did Jan Hendrik Oort die?

Jan Hendrik Oort passed away in Leiden[4].

What did Jan Hendrik Oort do for work?

Jan Hendrik Oort worked as an astronomer[5], physicist[6], and university teacher[7].

Where did Jan Hendrik Oort go to school?

Jan Hendrik Oort was educated at University of Groningen[16].

What awards did Jan Hendrik Oort receive?

Honors received include Bruce Medal[18], Gold Medal of the Royal Astronomical Society[19], Janssen Medal[20], and Prix Jules Janssen[21].

What did Jan Hendrik Oort discover?

Jan Hendrik Oort is credited as discoverer of Oort cloud[68].

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [2] ↑ . Great Soviet Encyclopedia (1969–1978). Retrieved . wikidata.org.
  2. [4] ↑ . Czech National Authority Database. Retrieved . wikidata.org.
  3. [45] ↑ . Leidse Hoogleraren. Retrieved . wikidata.org.
  4. [11] ↑ . Leidse Hoogleraren. Retrieved . wikidata.org.
  5. [16] ↑ . wikidata.org.
  6. [13] ↑ . wikidata.org.
  7. [14] ↑ . Czech National Authority Database. Retrieved . wikidata.org.
  8. [12] ↑ . wikidata.org.
  9. [5] ↑ . Integrated Authority File. Retrieved . wikidata.org.
  10. [6] ↑ . wikidata.org.
  11. [7] ↑ . Leidse Hoogleraren. Retrieved . wikidata.org.
  12. [15] ↑ . Leidse Hoogleraren. Retrieved . wikidata.org.
  13. [18] ↑ . phys-astro.sonoma.edu. Retrieved . phys-astro.sonoma.edu. Provenance: wikidata.org.
  14. [19] ↑ . wikidata.org.
  15. [20] ↑ . wikidata.org.
  16. [21] ↑ . wikidata.org.
  17. [22] ↑ . wikidata.org.
  18. [23] ↑ . Complete List of Royal Society Fellows 1660-2007. wikidata.org.
  19. [24] ↑ . wikidata.org.
  20. [25] ↑ . University of Bordeaux. Retrieved . 1886.u-bordeaux-montaigne.fr. Provenance: wikidata.org.
  21. [26] ↑ . lamont.columbia.edu. Retrieved . lamont.columbia.edu. Provenance: wikidata.org.
  22. [27] ↑ . wikidata.org.
  23. [28] ↑ . astronomische-gesellschaft.de. Retrieved . astronomische-gesellschaft.de. Provenance: wikidata.org.
  24. [29] ↑ . wikidata.org.
  25. [30] ↑ . kyotoprize.org. Retrieved . kyotoprize.org. Provenance: wikidata.org.
  26. [17] ↑ . Mathematics Genealogy Project. Retrieved . genealogy.ams.org. Provenance: wikidata.org.
  27. [46] ↑ . Mathematics Genealogy Project. Retrieved . genealogy.ams.org. Provenance: wikidata.org.
  28. [47] ↑ . Mathematics Genealogy Project. Retrieved . genealogy.ams.org. Provenance: wikidata.org.
  29. [48] ↑ . Mathematics Genealogy Project. Retrieved . genealogy.ams.org. Provenance: wikidata.org.
  30. [49] ↑ . Mathematics Genealogy Project. Retrieved . genealogy.ams.org. Provenance: wikidata.org.
  31. [50] ↑ . Mathematics Genealogy Project. wikidata.org.
  32. [51] ↑ . Mathematics Genealogy Project. wikidata.org.
  33. [52] ↑ . Mathematics Genealogy Project. wikidata.org.
  34. [53] ↑ . Mathematics Genealogy Project. wikidata.org.
  35. [54] ↑ . Mathematics Genealogy Project. wikidata.org.
  36. [55] ↑ . Mathematics Genealogy Project. wikidata.org.
  37. [56] ↑ . Mathematics Genealogy Project. wikidata.org.
  38. [57] ↑ . Mathematics Genealogy Project. wikidata.org.
  39. [58] ↑ . Mathematics Genealogy Project. wikidata.org.
  40. [59] ↑ . Mathematics Genealogy Project. wikidata.org.
  41. [60] ↑ . wikidata.org.
  42. [31] ↑ . wikidata.org.
  43. [32] ↑ . wikidata.org.
  44. [33] ↑ . wikidata.org.
  45. [34] ↑ . wikidata.org.
  46. [35] ↑ . www.pas.va. wikidata.org.
  47. [36] ↑ . wikidata.org.
  48. [37] ↑ . wikidata.org.
  49. [38] ↑ . wikidata.org.
  50. [39] ↑ . NNDB. wikidata.org.
  51. [40] ↑ . wikidata.org.
  52. [41] ↑ . wikidata.org.
  53. [42] ↑ . wikidata.org.
  54. [43] ↑ . wikidata.org.
  55. [44] ↑ . Retrieved . wikidata.org.
  56. [1] ↑ . Biografisch Portaal. Retrieved . wikidata.org.
  57. [9] ↑ . Czech National Authority Database. Retrieved . wikidata.org.
  58. [3] ↑ . Biografisch Portaal. Retrieved . wikidata.org.
  59. [10] ↑ . Czech National Authority Database. Retrieved . wikidata.org.
  60. [61] ↑ . Leidse Hoogleraren. Retrieved . wikidata.org.

Inverse relationships (entities pointing at this one)

  1. [68] ↑ . wikidata.org. → on this site
  2. [70] ↑ . wikidata.org. → on this site
  3. [75] ↑ . wikidata.org. → on this site
  4. [80] ↑ . wikidata.org. → on this site
  5. [62] ↑ . wikidata.org. → on this site
  6. [64] ↑ . wikidata.org. → on this site
  7. [65] ↑ . wikidata.org. → on this site

Inline context (facts about related entities)

  1. [69] ↑ . Wikidata. wikidata.org. → on this site
  2. [71] ↑ . Wikidata. wikidata.org. → on this site
  3. [72] ↑ . Wikidata. wikidata.org. → on this site
  4. [73] ↑ . Wikidata. wikidata.org. → on this site
  5. [74] ↑ . Wikidata. wikidata.org. → on this site
  6. [76] ↑ . Wikidata. wikidata.org. → on this site
  7. [77] ↑ . Wikidata. wikidata.org. → on this site
  8. [78] ↑ . Wikidata. wikidata.org. → on this site
  9. [79] ↑ . Wikidata. wikidata.org. → on this site
  10. [81] ↑ . Wikidata. wikidata.org. → on this site
  11. [82] ↑ . Wikidata. wikidata.org. → on this site
  12. [83] ↑ . Wikidata. wikidata.org. → on this site
  13. [84] ↑ . Wikidata. wikidata.org. → on this site
  14. [63] ↑ . Wikidata. wikidata.org. → on this site

Aggregate / graph-position facts

  1. [8] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [66] ↑ . Wikidata sitelinks. wikidata.org.
  3. [67] ↑ . Wikidata aliases. wikidata.org.

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Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). Jan Hendrik Oort. Retrieved October 10, 2026, from https://4ort.xyz/entity/jan-hendrik-oort
MLA “Jan Hendrik Oort.” 4ort.xyz Knowledge Graph, 4ort.xyz, 10 Oct. 2026, https://4ort.xyz/entity/jan-hendrik-oort.
BibTeX @misc{4ortxyz_jan-hendrik-oort_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Jan Hendrik Oort}}, year = {2026}, url = {https://4ort.xyz/entity/jan-hendrik-oort}, note = {Accessed: 2026-10-10}}
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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 7w ago · Mahirtwofivesix · 2026-08-19 view diff on Wikidata ↗
    Babelnet id → 00047963n
    Wordnet 3.1 synset id → 11235531-n
    Arabic ontology lexical concept id → 151060974
    "/* wbeditentity-statements-multiple-properties-update:0||4 */ added/modified IDs mapped to WordNet 3.1"
  2. 9w ago · Epìdosis · 2026-08-04 view diff on Wikidata ↗
    Accademia nazionale dei lincei id → oort-jan-hendrik
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/45365|batch #45365]]: Update P14091 IDs"
  3. 14w ago · Simon Villeneuve · 2026-07-05 view diff on Wikidata ↗
    Viaf cluster id → 3502149198292774940005
    "/* wbremoveclaims-remove:1| */ Nl cr aut id: mub20231176105"
  4. 14w ago · Simon Villeneuve · 2026-07-05 view diff on Wikidata ↗
    P14528 → 31682
    "/* wbsetclaim-create:1||1 */ P14528: 31682, Matched to [[:toollabs:mix-n-match/#/entry/291503413|Jan Oort (#291503413)]] in [[:toollabs:mix-n-match/#/catalog/7954|IAU member]] #mix'n'matc"
  5. 14w ago · Andre Engels · 2026-06-28 view diff on Wikidata ↗
    Local thumb → —
    University of amsterdam album academicum id → id020944
    "/* wbsetclaim-create:1||1 */ University of amsterdam album academicum id: id020944, Matched to [[:toollabs:mix-n-match/#/entry/87344937|Jan Ort (#87344937)]] in [[:toollabs:mix-n-match/#/catalog/3377|"
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