Andromeda XVIII [SEP] time of discovery
Andromeda XVIII
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 was announced in 2010 that the orbiting galaxies lie close to a plane running through M31's center.
See also.
- List of Andromeda's satellite galaxies
deg2 (camera) on the Canada-France-Hawaii Telescope (CFHT) had mapped the Andromeda Galaxy's stellar halo (one quarter) up to ~150 kpc. The survey, which had confirmed the clumpiness of Andromeda's stellar halo, had shown the existence of multiple other dwarf galaxies. They include: Andromeda XI, XII, XIII, XV, XVI, XVIII, XIX, and XX.
See also.
- Andromeda Galaxy
- Local Group
- List of Andromeda's satellite galaxies