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light-year

unit of astronomical length, defined as the distance that light travels in the vacuum in one year
Intangible unit_of_length Q531
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light-year

Summary

light-year is an unit of length[1]. light-year has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.[2]

Key Facts

  • light-year's instance of is recorded as unit of length[3].
  • light-year's instance of is recorded as non-standard unit[4].
  • light-year's instance of is recorded as UCUM derived unit[5].
  • light-year's instance of is recorded as physical constant[6].
  • light-year's instance of is recorded as UCUM constant[7].
  • light-year's measured physical quantity is recorded as length[8].
  • light-year's Commons category is recorded as Light-year[9].
  • light-year's described at URL is recorded as https://www.spektrum.de/lexikon/physik/lichtjahr/9014[10].
  • light-year's described by source is recorded as ISO 80000-3:2006 Quantities and units — Part 3: Space and time[11].
  • light-year's different from is recorded as Light year[12].
  • light-year's different from is recorded as Ly[13].
  • light-year's different from is recorded as Año luz[14].
  • light-year's conversion to SI unit is recorded as {'unit': 'Q11573', 'amount': '+9460730472580800'}[15].
  • light-year's conversion to standard unit is recorded as {'unit': 'Q828224', 'amount': '+9460730472580.8'}[16].
  • light-year's conversion to standard unit is recorded as {'unit': 'Q253276', 'amount': '+5878625541248'}[17].
  • light-year's conversion to standard unit is recorded as {'unit': 'Q3710', 'amount': '+31039143016731900'}[18].
  • light-year's conversion to standard unit is recorded as {'unit': 'Q218593', 'amount': '+372469718092929000'}[19].
  • light-year's conversion to standard unit is recorded as {'unit': 'Q482798', 'amount': '+10346381005577300'}[20].
  • light-year's conversion to standard unit is recorded as {'unit': 'Q12129', 'amount': '+0.3066014'}[21].
  • light-year's conversion to standard unit is recorded as {'unit': 'Q39359957', 'amount': '+5105122000000'}[22].
  • light-year's conversion to standard unit is recorded as {'unit': 'Q494083', 'amount': '+47028910479538'}[23].
  • light-year's conversion to standard unit is recorded as {'unit': 'Q39360235', 'amount': '+1959537968183'}[24].
  • light-year's conversion to standard unit is recorded as {'unit': 'Q39360471', 'amount': '+1702795305358'}[25].
  • light-year's conversion to standard unit is recorded as {'unit': 'Q1811', 'amount': '+63240'}[26].
  • light-year's Wikidata SPARQL query equivalent is recorded as wd:Q531 p:P2370/psn:P2370 [wikibase:quantityAmount ?source; wikibase:quantityUnit ?base]. ?item p:P2370/psn:P2370 [wikibase:quantityAmount ?target; wikibase:quantityUnit ?base]. BIND(?source / ?target as ?value)[27].

Body

Definition and Type

Recorded instance of include unit of length[3], non-standard unit[4], UCUM derived unit[5], physical constant[6], and UCUM constant[7].

Why It Matters

light-year has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.[2] light-year is known by 25 alternative names across languages and contexts.[28]

References

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

Direct Wikidata claims

  1. [3] ↑ . ISO 80000-3:2006 Quantities and units — Part 3: Space and time. Retrieved . wikidata.org.
  2. [4] ↑ . wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . ISO 80000-3:2006 Quantities and units — Part 3: Space and time. Retrieved . wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . wikidata.org.
  10. [12] ↑ . wikidata.org.
  11. [13] ↑ . wikidata.org.
  12. [14] ↑ . wikidata.org.
  13. [15] ↑ . wikidata.org.
  14. [16] ↑ . wikidata.org.
  15. [17] ↑ . wikidata.org.
  16. [18] ↑ . wikidata.org.
  17. [19] ↑ . wikidata.org.
  18. [20] ↑ . wikidata.org.
  19. [21] ↑ . wikidata.org.
  20. [22] ↑ . wikidata.org.
  21. [23] ↑ . wikidata.org.
  22. [24] ↑ . wikidata.org.
  23. [25] ↑ . wikidata.org.
  24. [26] ↑ . spektrum.de. Retrieved . spektrum.de. Provenance: wikidata.org.
  25. [27] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikidata sitelinks. wikidata.org.
  2. [28] ↑ . 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). light-year. Retrieved May 3, 2026, from https://4ort.xyz/entity/light-year
MLA “light-year.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/light-year.
BibTeX @misc{4ortxyz_light-year_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{light-year}}, year = {2026}, url = {https://4ort.xyz/entity/light-year}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): light-year — https://4ort.xyz/entity/light-year (retrieved 2026-05-03)

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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. 17d ago · WikiLucas00 · 2026-08-02 view diff on Wikidata ↗
    Pronunciation audio → LL-Q8097 (tel)-ప్రశాంతి-కాంతి సంవత్సరం.wav
    "/* wbcreateclaim-create:1| */ [[Property:P443]]: LL-Q8097 (tel)-ప్రశాంతి-కాంతి సంవత్సరం.wav"
  2. 5w ago · Nyuhn · 2026-07-10 view diff on Wikidata ↗
    P14541 → 1gtmA1
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/40849|batch #40849]]: ZGBK ID"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.