: Astronomie: dwarf spheroidal galaxy

galactic and extragalactic astronomy > galaxy > elliptical galaxy > dwarf spheroidal galaxy

dwarf spheroidal galaxy

A dwarf spheroidal galaxy (dSph) is a term in astronomy applied to small, low-luminosity galaxies with very little dust and an older stellar population. They are found in the Local Group as companions to the Milky Way and to systems that are companions to the Andromeda Galaxy (M31). While similar to dwarf elliptical galaxies in appearance and properties such as little to no gas or dust or recent star formation, they are approximately spheroidal in shape and generally have lower luminosity. (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Dwarf_spheroidal_galaxy)

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