John Louis Emil Dreyer

Danish-Irish astronomer
Person human Q265015
John Louis Emil Dreyer
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Summary

John Louis Emil Dreyer was born on February 13, 1852[1], in Copenhagen[2]. He died on September 14, 1926[3], in Oxford[4]. He worked as an astronomer[5] and biographer[6]. He ranks in the top 0.73% of human entities by monthly Wikipedia readership (200 views/month, #7,285 of 1,000,298).[7]

Key Facts

  • Father: Frederik Dreyer[8]
  • Spouse: Katherine Hannah Tuthill[9]
  • Child: Frederic Charles Dreyer[10], John Tuthill Dreyer[11]
  • Country of citizenship: Kingdom of Denmark[12], Ireland[13], United Kingdom[14]
  • Field of work: astronomy[15]
  • Position held: President of the Royal Astronomical Society[16]
  • Employer: Armagh Observatory[17]
  • Award received: Gold Medal of the Royal Astronomical Society[18], honorary doctor of Queen's University Belfast[19]
  • Member of: Royal Danish Academy of Sciences and Letters[20]
  • Sex or gender: male[21]
  • Commons category: John Louis Emil Dreyer[22]
  • Family name: Dreyer[23]
  • Given name: John[24], Louis[25], Emil[26]
  • Described by source: Astronomers: A Biographical Reference[27]
  • Languages spoken, written or signed: Danish[28], English[29]
  • Name in native language: Johan Ludvig Emil Dreyer[30]
  • Maintained by WikiProject: WikiProject Mathematics[31]

Body

Works and Contributions

Things named for John Louis Emil Dreyer include Dreyer[32].

Why It Matters

John Louis Emil Dreyer has Wikipedia articles in 23 language editions, a strong signal of global cultural recognition.[33] He is known by 24 alternative names across languages and contexts.[34]

He is credited with the discovery of NGC 373[35], an elliptical galaxy[36]; NGC 372[37], an asterism[38]; NGC 1195[39], a galaxy[40]; NGC 4011[41], an emission-line galaxy[42]; NGC 4018[43], a radio galaxy[44]; and NGC 3069[45], a galaxy[46]. Works attributed to him include New General Catalogue[47]. Entities named for him include Dreyer[32].

FAQs

Where was John Louis Emil Dreyer born?

John Louis Emil Dreyer's place of birth was Copenhagen[2].

Where did John Louis Emil Dreyer die?

John Louis Emil Dreyer passed away in Oxford[4].

Who were John Louis Emil Dreyer's parents?

John Louis Emil Dreyer's father was Frederik Dreyer[8].

Who was John Louis Emil Dreyer married to?

John Louis Emil Dreyer's spouses include Katherine Hannah Tuthill[9].

What did John Louis Emil Dreyer do for work?

John Louis Emil Dreyer worked as an astronomer[5] and biographer[6].

What awards did John Louis Emil Dreyer receive?

Honors received include Gold Medal of the Royal Astronomical Society[18] and honorary doctor of Queen's University Belfast[19].

What did John Louis Emil Dreyer discover?

John Louis Emil Dreyer is credited as discoverer of NGC 373[35], NGC 372[37], NGC 1195[39], and NGC 4011[41].

References

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

Direct Wikidata claims

  1. [2] ↑ . wikidata.org.
  2. [4] ↑ . wikidata.org.
  3. [21] ↑ . Integrated Authority File. Retrieved . wikidata.org.
  4. [8] ↑ . The Peerage. wikidata.org.
  5. [9] ↑ . Retrieved . wikidata.org.
  6. [12] ↑ . wikidata.org.
  7. [13] ↑ . wikidata.org.
  8. [14] ↑ . wikidata.org.
  9. [16] ↑ . wikidata.org.
  10. [10] ↑ . The Peerage. wikidata.org.
  11. [11] ↑ . The Peerage. wikidata.org.
  12. [15] ↑ . wikidata.org.
  13. [5] ↑ . Integrated Authority File. Retrieved . wikidata.org.
  14. [6] ↑ . wikidata.org.
  15. [17] ↑ . wikidata.org.
  16. [18] ↑ . wikidata.org.
  17. [19] ↑ . qub.ac.uk. qub.ac.uk. Provenance: wikidata.org.
  18. [22] ↑ . wikidata.org.
  19. [20] ↑ . wikidata.org.
  20. [1] ↑ . Encyclopædia Britannica Online. Retrieved . wikidata.org.
  21. [3] ↑ . Encyclopædia Britannica Online. Retrieved . wikidata.org.
  22. [23] ↑ . wikidata.org.
  23. [24] ↑ . wikidata.org.
  24. [25] ↑ . wikidata.org.
  25. [26] ↑ . wikidata.org.
  26. [27] ↑ . wikidata.org.
  27. [28] ↑ . wikidata.org.
  28. [29] ↑ . CONOR.SI. wikidata.org.
  29. [30] ↑ . wikidata.org.
  30. [31] ↑ . wikidata.org.

Inverse relationships (entities pointing at this one)

  1. [35] ↑ . wikidata.org. → on this site
  2. [37] ↑ . wikidata.org. → on this site
  3. [39] ↑ . wikidata.org. → on this site
  4. [41] ↑ . wikidata.org. → on this site
  5. [43] ↑ . wikidata.org. → on this site
  6. [45] ↑ . wikidata.org. → on this site
  7. [47] ↑ . wikidata.org. → on this site
  8. [32] ↑ . wikidata.org. → on this site

Inline context (facts about related entities)

  1. [36] ↑ . Wikidata. wikidata.org. → on this site
  2. [38] ↑ . Wikidata. wikidata.org. → on this site
  3. [40] ↑ . Wikidata. wikidata.org. → on this site
  4. [42] ↑ . Wikidata. wikidata.org. → on this site
  5. [44] ↑ . Wikidata. wikidata.org. → on this site
  6. [46] ↑ . Wikidata. wikidata.org. → on this site

Aggregate / graph-position facts

  1. [7] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [33] ↑ . Wikidata sitelinks. wikidata.org.
  3. [34] ↑ . 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). John Louis Emil Dreyer. Retrieved October 14, 2026, from https://4ort.xyz/entity/john-louis-emil-dreyer
MLA “John Louis Emil Dreyer.” 4ort.xyz Knowledge Graph, 4ort.xyz, 14 Oct. 2026, https://4ort.xyz/entity/john-louis-emil-dreyer.
BibTeX @misc{4ortxyz_john-louis-emil-dreyer_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{John Louis Emil Dreyer}}, year = {2026}, url = {https://4ort.xyz/entity/john-louis-emil-dreyer}, note = {Accessed: 2026-10-14}}
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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. 2d ago · AntiDerangedKhanTengriAction · 2026-10-14 view diff on Wikidata ↗
    Wikipedia languages → ['ar', 'az', 'bs', 'ca', 'ckb', 'commons', 'cs', 'da', 'de', 'diq', 'el', 'en',
    Open library id → OL953247A, OL5976192A
    Claims rich → —
    "/* wbcreateclaim-create:1| */ Open library id: OL5976192A, [[:toollabs:quickstatements/#/batch/290734|batch #290734]]"
  2. 26d ago · Spinster300 · 2026-09-19 view diff on Wikidata ↗
    National library of poland mms id → 9812830885705606
    Canadiana name authority id → ncf11418314
    Rero id (legacy) → A003191036
    National library of korea id → KAC2024A9917
    + 2 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-create:2||1 */ Canadiana name authority id: ncf11418314, Added with [[User:Bargioni/moreIdentifiers|moreIdentifiers]]"
  3. 9w ago · Rouletteer · 2026-08-11 view diff on Wikidata ↗
    Position held → President of the Royal Astronomical Society
    "/* wbsetclaim-create:2||1 */ Position held: President of the Royal Astronomical Society"
  4. 13w ago · Nyuhn · 2026-07-10 view diff on Wikidata ↗
    P14541 → 1zgtDI
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/40849|batch #40849]]: ZGBK ID"
  5. 23w ago · Bargioni · 2026-05-07 view diff on Wikidata ↗
    Occupation → —
    Local thumb → —
    Member of → —
    Languages spoken, written or signed → Danish, English
    + 23 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/30468|batch #30468]]: add P1810 to P5739 2/3"
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