celestial sphere

imaginary sphere of arbitrarily large radius, concentric with the observer
Thing sphere Q12134
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The celestial sphere is a conceptual model used in astronomy to describe the apparent positions of celestial objects as seen from Earth [1]. It is imagined as a large sphere surrounding Earth, upon which all celestial bodies appear to be projected. This model provides a convenient framework for mapping the sky and describing the locations of stars, planets, and other astronomical objects relative to an observer. The concept helps astronomers and navigators describe directions in the sky using simple angular coordinates, regardless of the observer's actual location on Earth's surface.

celestial sphere

Summary

celestial sphere is a sphere[1]. It draws 1,785 Wikipedia views per month (sphere category, ranking #1 of 4).[2]

Key Facts

  • celestial sphere's instance of is recorded as sphere[3].
  • celestial sphere's depicts is recorded as observable universe[4].
  • celestial sphere is part of astronomy[5].
  • celestial sphere's Commons category is recorded as Celestial spheres[6].
  • celestial sphere comprises Northern celestial hemisphere[7].
  • celestial sphere comprises Southern Celestial Hemisphere[8].
  • celestial sphere comprises celestial hemisphere[9].
  • celestial sphere's described by source is recorded as Armenian Soviet Encyclopedia[10].
  • celestial sphere's described by source is recorded as New Encyclopedic Dictionary[11].
  • celestial sphere's described by source is recorded as New Encyclopedic Dictionary[12].
  • celestial sphere's described by source is recorded as Otto's encyclopedia[13].
  • celestial sphere's described by source is recorded as Brockhaus and Efron Encyclopedic Dictionary[14].
  • celestial sphere's described by source is recorded as Small Brockhaus and Efron Encyclopedic Dictionary[15].
  • celestial sphere's described by source is recorded as Brockhaus and Efron Encyclopedic Dictionary[16].
  • celestial sphere's described by source is recorded as Meyers Konversations-Lexikon, 4th edition (1885–1890)[17].
  • celestial sphere's described by source is recorded as Pauly–Wissowa[18].
  • celestial sphere's different from is recorded as firmament[19].
  • celestial sphere's on focus list of Wikimedia project is recorded as Wikipedia:Vital articles/Level/4[20].

Body

Definition and Type

celestial sphere's instance of is recorded as sphere[3].

Use and Application

Components include Northern celestial hemisphere[7], a celestial hemisphere[21]; Southern Celestial Hemisphere[8], a celestial hemisphere[22]; and celestial hemisphere[9]. celestial sphere is part of astronomy[5].

Why It Matters

celestial sphere draws 1,785 Wikipedia views per month (sphere category, ranking #1 of 4).[2] It has Wikipedia articles in 29 language editions, a strong signal of global cultural recognition.[23] It is known by 12 alternative names across languages and contexts.[24]

References

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

Direct Wikidata claims

  1. [3] . A Short History of Astronomy. wikidata.org.
  2. [4] . wikidata.org.
  3. [5] . wikidata.org.
  4. [6] . wikidata.org.
  5. [7] . wikidata.org.
  6. [8] . 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.

Inline context (facts about related entities)

  1. [21] . Wikidata. wikidata.org. → on this site
  2. [22] . Wikidata. wikidata.org. → on this site

Class ancestry

  1. [1] . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [23] . Wikidata sitelinks. wikidata.org.
  3. [24] . 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). celestial sphere. Retrieved May 3, 2026, from https://4ort.xyz/entity/celestial-sphere
MLA “celestial sphere.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/celestial-sphere.
BibTeX @misc{4ortxyz_celestial-sphere_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{celestial sphere}}, year = {2026}, url = {https://4ort.xyz/entity/celestial-sphere}, note = {Accessed: 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. 4w ago · Bouzinac · 2026-05-31 view diff on Wikidata ↗
    Has part(s) Northern celestial hemisphere, Southern Celestial Hemisphere, celestial hemisphere
    "/* wbcreateclaim-create:1| */ [[Property:P527]]: [[Q145825]], using [[User:Frettie/consistency check add.js]]"
  2. 6w ago · Twofivesixbot bot · 2026-05-23 view diff on Wikidata ↗
    Part of astronomy
    Depicts observable universe
    Instance of sphere
    Has part(s) Northern celestial hemisphere, Southern Celestial Hemisphere, celestial hemisphere
    + 8 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-update-qualifiers:1||1|3 */ [[Property:P8189]]: 987007542043805171, mv to monolingual text names on J9U statements"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.