NGC 21

spiral galaxy in the constellation Andromeda
Thing spiral_galaxy Q34500
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NGC 21

Summary

NGC 21 is a spiral galaxy[1]. It has Wikipedia articles in 49 language editions, a strong signal of global cultural recognition.[2]

Key Facts

  • NGC 21 is credited with the discovery of William Herschel[3].
  • NGC 21's image is recorded as NGC29 - SDSS DR14.jpg[4].
  • NGC 21's instance of is recorded as spiral galaxy[5].
  • NGC 21's constellation is recorded as Andromeda[6].
  • NGC 21's galaxy morphological type is recorded as SBbc[7].
  • NGC 21's galaxy morphological type is recorded as Sbc[8].
  • NGC 21's part of is recorded as Q67623147[9].
  • NGC 21's part of is recorded as Q67624903[10].
  • NGC 21's part of is recorded as Q67793625[11].
  • NGC 21's part of is recorded as Q90689716[12].
  • NGC 21's Commons category is recorded as NGC 21[13].
  • NGC 21's said to be the same as is recorded as NGC 29[14].
  • NGC 21's catalog code is recorded as NGC 21[15].
  • NGC 21's catalog code is recorded as UGC 100[16].
  • NGC 21's catalog code is recorded as IRAS 00082+3304[17].
  • NGC 21's catalog code is recorded as 2MASX J00104688+3321102[18].
  • NGC 21's catalog code is recorded as PGC 767[19].
  • NGC 21's catalog code is recorded as NGC 29[20].
  • NGC 21's catalog code is recorded as MCG+05-01-048[21].
  • NGC 21's catalog code is recorded as IRAS F00081+3304[22].
  • NGC 21's catalog code is recorded as PSCz Q00082+3304[23].
  • NGC 21's catalog code is recorded as UZC J001046.9+332110[24].
  • NGC 21's catalog code is recorded as Z 0008.1+3305[25].
  • NGC 21's catalog code is recorded as Z 499-66[26].
  • NGC 21's catalog code is recorded as LEDA 767[27].

Body

Works and Contributions

NGC 21 is credited with the discovery of William Herschel[3].

Why It Matters

NGC 21 has Wikipedia articles in 49 language editions, a strong signal of global cultural recognition.[2]

References

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

Direct Wikidata claims

  1. [4] . wikidata.org.
  2. [5] . wikidata.org.
  3. [6] . VizieR. wikidata.org.
  4. [3] . wikidata.org.
  5. [7] . wikidata.org.
  6. [8] . SIMBAD. wikidata.org.
  7. [9] . SIMBAD. wikidata.org.
  8. [10] . SIMBAD. wikidata.org.
  9. [11] . SIMBAD. wikidata.org.
  10. [12] . wikidata.org.
  11. [13] . wikidata.org.
  12. [14] . wikidata.org.
  13. [15] . NASA/IPAC Extragalactic Database. ned.ipac.caltech.edu. Provenance: wikidata.org.
  14. [16] . NASA/IPAC Extragalactic Database. ned.ipac.caltech.edu. Provenance: wikidata.org.
  15. [17] . NASA/IPAC Extragalactic Database. ned.ipac.caltech.edu. Provenance: wikidata.org.
  16. [18] . NASA/IPAC Extragalactic Database. ned.ipac.caltech.edu. Provenance: wikidata.org.
  17. [19] . Lyon-Meudon Extragalactic Database. leda.univ-lyon1.fr. Provenance: wikidata.org.
  18. [20] . Lyon-Meudon Extragalactic Database. leda.univ-lyon1.fr. Provenance: wikidata.org.
  19. [21] . NASA/IPAC Extragalactic Database. ned.ipac.caltech.edu. Provenance: wikidata.org.
  20. [22] . SIMBAD. wikidata.org.
  21. [23] . SIMBAD. wikidata.org.
  22. [24] . SIMBAD. wikidata.org.
  23. [25] . SIMBAD. wikidata.org.
  24. [26] . SIMBAD. wikidata.org.
  25. [27] . SIMBAD. wikidata.org.

Class ancestry

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

Aggregate / graph-position facts

  1. [2] . Wikidata sitelinks. 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). NGC 21. Retrieved May 7, 2026, from https://4ort.xyz/entity/ngc-21
MLA “NGC 21.” 4ort.xyz Knowledge Graph, 4ort.xyz, 7 May. 2026, https://4ort.xyz/entity/ngc-21.
BibTeX @misc{4ortxyz_ngc-21_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{NGC 21}}, year = {2026}, url = {https://4ort.xyz/entity/ngc-21}, note = {Accessed: 2026-05-07}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): NGC 21 — https://4ort.xyz/entity/ngc-21 (retrieved 2026-05-07)

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