Editing Dwarf spheroidal galaxy (section)

{{Short description|Low-luminosity galaxy of old stars & little dust}}
{{Multiple image
| image1 = NGC 0147 2MASS.jpg
| width1 = 180
| image2 = Fornax_dwarf_galaxy.jpg
| width2 = 180
| footer = [[NGC147]] (left) and the [[Fornax Dwarf]] (right), two of the earliest known dwarf spheroidal galaxies.
}}

A '''dwarf spheroidal galaxy''' ('''dSph''') is a [[Technical term|term]] in [[astronomy]] applied to small, low-luminosity [[Galaxy|galaxies]] with very little dust and an older stellar population. They are found in the [[Local Group]] as companions to the [[Milky Way]] and as systems that are companions to the [[Andromeda Galaxy]] (M31). While similar to [[Dwarf elliptical galaxy|dwarf elliptical galaxies]] in appearance and properties such as little to no [[Interstellar medium|gas or dust]] or recent [[star formation]], they are approximately [[spheroid]]al in shape and generally have lower luminosity.