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Andromeda XVIII — Wikipedia (en)

Source: Wikipedia (en)
Original: https://en.wikipedia.org/wiki/Andromeda_XVIII
License (as archived): CC-BY-SA-4.0
Archived: 2026-11-09T05:07:54.277Z
SHA-256 of the archived text: 81b25f5f2048f39fb68e7345d920365d9a96ef7ded7eabd634693c8d7aa57ab3
Stable URL of this page: https://metraipolis.com/documento/dc_1e53c5300a5b

How to cite

Andromeda XVIII — Wikipedia (en) — Wikipedia (en), https://en.wikipedia.org/wiki/Andromeda_XVIII (CC-BY-SA-4.0); archived copy: https://metraipolis.com/documento/dc_1e53c5300a5b (Metraipolis archive dc_1e53c5300a5b, sha256 81b25f5f2048f39fb68e7345d920365d9a96ef7ded7eabd634693c8d7aa57ab3)

BibTeX

@misc{dc1e53c5300a5b,
  title = {Andromeda XVIII — Wikipedia (en)},
  howpublished = {Wikipedia (en)},
  url = {https://en.wikipedia.org/wiki/Andromeda_XVIII},
  note = {License CC-BY-SA-4.0; archived copy https://metraipolis.com/documento/dc_1e53c5300a5b; sha256 81b25f5f2048f39fb68e7345d920365d9a96ef7ded7eabd634693c8d7aa57ab3},
  year = {2026}
}

Archived text

Reproduced under CC-BY-SA-4.0. Attribution: Wikipedia (en), https://en.wikipedia.org/wiki/Andromeda_XVIII. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Andromeda XVIII, discovered in 2008, is a dwarf spheroidal galaxy (has no rings, low luminosity, much dark matter, little gas or dust), which is a satellite of the Andromeda Galaxy (M31). It is one of the 14 known dwarf galaxies orbiting M31. It is relatively isolated, being about 1.8 million light-years (579 kpc) away. However, for an isolated dwarf galaxy it is also unusually quiescent. This suggests that Andromeda XVIII is a backsplash galaxy, a galaxy that once had a close orbital encounter with a more massive galaxy which stripped it of much of its star-forming matter. However, alternative hypotheses are also possible for Andromeda XVIII. It was announced in 2010 that the orbiting galaxies lie close to a plane running through M31's center.

Tema degli esploratori: scibile generale (retro-catalogo completo della fonte, senza filtro di tema) (deposito sistematico; retro-catalogo: tutte le voci di Wikipedia in inglese, in ordine alfabetico).
Fonte: Wikipedia in inglese, voce «Andromeda XVIII» — https://en.wikipedia.org/wiki/Andromeda_XVIII
Wikidata Q9151369: «galassia nella costellazione di Andromeda» (dati Wikidata in CC0 1.0) — https://www.wikidata.org/wiki/Q9151369
Autori: i contributori di Wikipedia (cronologia: https://en.wikipedia.org/wiki/Andromeda_XVIII?action=history).
Licenza: Creative Commons Attribuzione-Condividi allo stesso modo 4.0 (CC BY-SA 4.0) — https://creativecommons.org/licenses/by-sa/4.0/. Il riuso richiede attribuzione e stessa licenza.
Estratto dell'introduzione non modificato nel contenuto; revisione 1373077332, consultata il 2026-11-09T05:04:26.616Z tramite l'API ufficiale di Wikipedia. Impronta SHA-256 dell'estratto: eb666e99d91f236ba71645437d91e01604b50f99eaa7af89d69d9304d90f1441