Ole Rømer

Danish astronomer (*1644 – †1710)
Person human Q160187
Ole Rømer
Jacob Coning · Public Domain · Wikimedia
Press Enter · cited answer in seconds

Ole Rømer

Summary

Ole Rømer is a human[1]. Born in Aarhus[2], he… he was born on September 25, 1644[3]. He died in Copenhagen[4]. He died on September 19, 1710[5]. He worked as an astronomer[6], physicist[7], mathematician[8], university teacher[9], and judge[10]. He ranks in the top 0.72% of human entities by monthly Wikipedia readership (247 views/month, #7,228 of 1,000,298).[11]

Key Facts

  • Born in Aarhus[2], Ole Rømer…
  • Ole Rømer passed away in Copenhagen[4].
  • Ole Rømer was born on September 25, 1644[3].
  • Ole Rømer died on September 19, 1710[5].
  • Ole Rømer was married to Anne Marie Bartholin[12].
  • Ole Rømer held citizenship in Kingdom of Denmark[13].
  • Ole Rømer's professions included astronomer[6].
  • Ole Rømer worked as a physicist[7].
  • Ole Rømer's professions included mathematician[8].
  • Ole Rømer worked as a university teacher[9].
  • Ole Rømer's professions included judge[10].
  • Ole Rømer worked as a patent inventor[14].
  • Ole Rømer's field of work was astronomy[15].
  • Among Ole Rømer's employers was University of Copenhagen[16].
  • Ole Rømer was educated at University of Copenhagen[17].
  • Ole Rømer was educated at Aarhus Katedralskole[18].
  • A notable work attributed to Ole Rømer is Rømer's determination of the speed of light[19].
  • Ole Rømer was a member of French Academy of Sciences[20].
  • Ole Rømer was a member of Royal Prussian Academy of Sciences[21].
  • Ole Rømer's religion is recorded as Lutheranism[22].
  • Ole Rømer is recorded as male[23].
  • Ole Rømer's instance of is recorded as human[24].
  • Ole Rømer's Commons category is recorded as Ole Rømer[25].
  • Ole Rømer's residence is recorded as Copenhagen[26].
  • Ole Rømer's family name is recorded as Rømer[27].

Body

Origins and Family

Ole Rømer's place of birth was Aarhus[2]. He was born on September 25, 1644[3].

Education

Educated at University of Copenhagen[17], a public research university[28], in Denmark[29], founded in 1479[30] and Aarhus Katedralskole[18], a gymnasium[31], in Denmark[32], founded in 1195[33].

Career and Affiliations

Recorded occupations include astronomer[6], physicist[7], mathematician[8], university teacher[9], judge[10], and patent inventor[14]. Ole Rømer's field of work was astronomy[15]. Among his employers was University of Copenhagen[16].

Works and Contributions

A notable work attributed to Ole Rømer is Rømer's determination of the speed of light[19]. Things named for him include Rømer scale[34], a temperature scale[35]; Römer[36], an impact crater[37]; Ole Rømer Observatory[38], an astronomical observatory[39], in Denmark[40]; 2897 Ole Römer[41], an asteroid[42]; and Ole Rømer Medal[43], a science award[44], in Denmark[45].

Personal Life

Among Ole Rømer's spouses was Anne Marie Bartholin[12]. His religion is recorded as Lutheranism[22].

Death and Burial

Ole Rømer died on September 19, 1710[5]. He passed away in Copenhagen[4].

Why It Matters

Ole Rømer ranks in the top 0.72% of human entities by monthly Wikipedia readership (247 views/month, #7,228 of 1,000,298).[11] He has Wikipedia articles in 28 language editions, a strong signal of global cultural recognition.[46] He is known by 93 alternative names across languages and contexts.[47]

He is credited with the discovery of speed of light in vacuum[48], a physical constant[49] and Rømer's determination of the speed of light[50], a Q134348943[51], in France[52]. Entities named for him include Rømer scale[34], a temperature scale[35]; Römer[36], an impact crater[37]; Ole Rømer Observatory[38], an astronomical observatory[39], in Denmark[40]; 2897 Ole Römer[41], an asteroid[42]; and Ole Rømer Medal[43], a science award[44], in Denmark[45].

FAQs

Where was Ole Rømer born?

Born in Aarhus[2], Ole Rømer…

Where did Ole Rømer die?

Ole Rømer died in Copenhagen[4].

Who was Ole Rømer married to?

Ole Rømer's spouses include Anne Marie Bartholin[12].

What did Ole Rømer do for work?

Ole Rømer worked as astronomer[6], physicist[7], mathematician[8], university teacher[9], and judge[10].

Where did Ole Rømer go to school?

Ole Rømer was educated at University of Copenhagen[17] and Aarhus Katedralskole[18].

What did Ole Rømer discover?

Ole Rømer is credited as discoverer of speed of light in vacuum[48] and Rømer's determination of the speed of light[50].

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. [23] ↑ . BnF authorities. Retrieved . wikidata.org.
  4. [12] ↑ . wikidata.org.
  5. [13] ↑ . BBC Programme Catalogue. wikidata.org.
  6. [24] ↑ . BnF authorities. Retrieved . wikidata.org.
  7. [17] ↑ . wikidata.org.
  8. [18] ↑ . wikidata.org.
  9. [15] ↑ . wikidata.org.
  10. [6] ↑ . JSTOR. Retrieved . washingtonpost.com. Provenance: wikidata.org.
  11. [7] ↑ . Integrated Authority File. Retrieved . wikidata.org.
  12. [8] ↑ . wikidata.org.
  13. [9] ↑ . wikidata.org.
  14. [10] ↑ . wikidata.org.
  15. [14] ↑ . adsabs.harvard.edu. adsabs.harvard.edu. Provenance: wikidata.org.
  16. [16] ↑ . wikidata.org.
  17. [22] ↑ . wikidata.org.
  18. [25] ↑ . wikidata.org.
  19. [20] ↑ . wikidata.org.
  20. [21] ↑ . wikidata.org.
  21. [26] ↑ . wikidata.org.
  22. [3] ↑ . Integrated Authority File. Retrieved . wikidata.org.
  23. [5] ↑ . Integrated Authority File. Retrieved . wikidata.org.
  24. [27] ↑ . wikidata.org.
  25. [19] ↑ . Retrieved . wikidata.org.

Inverse relationships (entities pointing at this one)

  1. [48] ↑ . wikidata.org. → on this site
  2. [50] ↑ . wikidata.org. → on this site
  3. [34] ↑ . wikidata.org. → on this site
  4. [36] ↑ . wikidata.org. → on this site
  5. [38] ↑ . wikidata.org. → on this site
  6. [41] ↑ . wikidata.org. → on this site
  7. [43] ↑ . wikidata.org. → on this site

Inline context (facts about related entities)

  1. [28] ↑ . Wikidata. wikidata.org. → on this site
  2. [29] ↑ . Wikidata. wikidata.org. → on this site
  3. [30] ↑ . Wikidata. wikidata.org. → on this site
  4. [31] ↑ . Wikidata. wikidata.org. → on this site
  5. [32] ↑ . Wikidata. wikidata.org. → on this site
  6. [33] ↑ . Wikidata. wikidata.org. → on this site
  7. [49] ↑ . Wikidata. wikidata.org. → on this site
  8. [51] ↑ . Wikidata. wikidata.org. → on this site
  9. [52] ↑ . Wikidata. wikidata.org. → on this site
  10. [35] ↑ . Wikidata. wikidata.org. → on this site
  11. [37] ↑ . Wikidata. wikidata.org. → on this site
  12. [39] ↑ . Wikidata. wikidata.org. → on this site
  13. [40] ↑ . Wikidata. wikidata.org. → on this site
  14. [42] ↑ . Wikidata. wikidata.org. → on this site
  15. [44] ↑ . Wikidata. wikidata.org. → on this site
  16. [45] ↑ . Wikidata. wikidata.org. → on this site

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [11] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [46] ↑ . Wikidata sitelinks. wikidata.org.
  3. [47] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

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). Ole Rømer. Retrieved October 9, 2026, from https://4ort.xyz/entity/ole-rmer
MLA “Ole Rømer.” 4ort.xyz Knowledge Graph, 4ort.xyz, 9 Oct. 2026, https://4ort.xyz/entity/ole-rmer.
BibTeX @misc{4ortxyz_ole-rmer_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Ole Rømer}}, year = {2026}, url = {https://4ort.xyz/entity/ole-rmer}, note = {Accessed: 2026-10-09}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Ole Rømer — https://4ort.xyz/entity/ole-rmer (retrieved 2026-10-09)

Canonical URL: https://4ort.xyz/entity/ole-rmer · Last refreshed:

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. 4d ago · Printstream · 2026-10-06 view diff on Wikidata ↗
    Sitelink count → 80
    Wikipedia languages → ['als', 'ar', 'arz', 'ast', 'az', 'azb', 'bat_smg', 'be', 'be_x_old', 'bg', 'bn'
    Claims rich → —
    "/* wbeditentity-update-languages-short:0||de */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/57891|batch #57891]]: Import missing aliases from dewiki 1/5"
  2. 4w ago · Anti-Strange-Ipek-Action · 2026-09-06 view diff on Wikidata ↗
    Bibliography of the history of slovakia id → 68658, 68659
    "/* wbcreateclaim-create:1| */ [[Property:P8238]]: 68659, [[:toollabs:quickstatements/#/batch/270918|batch #270918]]"
  3. 11w ago · ~2026-40841-63 · 2026-07-22 view diff on Wikidata ↗
    Name in native language → {'lang': 'da', 'text': 'Ole Rømer'}
    "/* wbsetclaim-update:2||1 */ [[Property:P1559]]: Ole Rømer"
  4. 15w ago · Printstream · 2026-06-25 view diff on Wikidata ↗
    P14536 → 412562
    "/* wbcreateclaim-create:1| */ [[Property:P14536]]: 412562, #quickstatements; #temporary_batch_1782398664614"
  5. 18w ago · MarketaGeneea · 2026-06-02 view diff on Wikidata ↗
    Name in native language → {'lang': 'da', 'text': 'Ole Rømer'}
    Instance of → human
    "/* wbsetclaim-update:2||1 */ [[Property:P31]]: [[Q5]]"
  6. 19w ago · ~2026-32082-72 · 2026-05-29 view diff on Wikidata ↗
    Instance of → human
    "/* wbsetclaim-update:2||1 */ [[Property:P31]]: [[Q205740]]"
  7. 21w ago · Epìdosis · 2026-05-15 view diff on Wikidata ↗
    Cerl thesaurus id → cnp02313219
    Local thumb → —
    "/* wbremoveclaims-remove:1| */ [[Property:P1871]]: cnp00400398, [[:toollabs:quickstatements/#/batch/257929|batch #257929]]"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.