Linked from

The 35 pages that link to Andromeda Galaxy, each with the reason it gives.

• Dark matter haloBroader topic: Its satellites and rotation provide an independent view of a massive galaxy halo.

• Edwin HubbleBroader topic: Cepheids observed there showed that Andromeda lay far outside the Milky Way.

• Cepheid variableBroader topic: Cepheid observations established its distance and helped reveal that it lies beyond the Milky Way.

• GalaxyBroader topic: Its approaching motion and scale make it a key example of a neighboring large galaxy.

• Spiral galaxyBroader topic: Its nearly face-on view makes its broad spiral structure comparatively easy to study.

• Galaxy rotation curveBroader topic: Its rotation has been mapped across stars, gas, and satellite tracers.

• Messier catalogBroader topic: M31 demonstrates that the catalog includes galaxies, not only nebulae and star clusters.

• Missing satellites problemBroader topic: Its satellite population tests whether the mismatch extends beyond our own galaxy.

• Vesto SlipherBroader topic: Slipher measured its unusually large approach speed, a landmark result among spiral nebulae.

• New General CatalogueBroader topic: Its NGC designation, NGC 224, illustrates the catalogue's reach beyond objects then understood as galaxies.

• Spiral armBroader topic: Its disk offers a nearby external view of spiral structure.

• Hubble flowBroader topic: Its approach illustrates that local peculiar motion can oppose the average recession pattern.

• Walter BaadeBroader topic: Baade resolved its stars and identified distinct stellar populations there.

• Nuclear star clusterBroader topic: Its nucleus has a distinctive double-peaked appearance associated with an eccentric stellar disk.

• Vera RubinBroader topic: Rubin and Ford’s observations of Andromeda helped establish that its outer regions rotate rapidly.

• Messier objectBroader topic: It is one of the catalogue’s most prominent galaxies.

• William HugginsBroader topic: Huggins found a continuous spectrum from Andromeda, then commonly classified as a nebula.

• Night skyBroader topic: Under dark skies, it is among the most distant objects visible to the unaided eye.

• Abd al-Rahman al-SufiBroader topic: Al-Sufi recorded a cloudlike object in Andromeda, an early surviving description of this galaxy.

• Local SheetBroader topic: It is a major member of the group within the sheet.

• Unbarred spiral galaxyBroader topic: It is commonly classified as an unbarred spiral galaxy.

• Dorothea KlumpkeBroader topic: Klumpke studied nebulae in the period when Andromeda’s true nature was still debated.

• Formation and evolution of stars and galaxiesBroader topic: Its structure and future merger with the Milky Way illustrate galaxy interaction and growth.