Apod: march 24, 1999 - brown dwarf gliese 229b, Astronomy picture of the day . discover the cosmos! each day a different image or photograph of our fascinating universe is featured, along with a brief explanation. Dwarf spheroidal galaxy - wikipedia, free encyclopedia, Dwarf spheroidal galaxy (dsph) is a term in astronomy applied to low luminosity galaxies that are companions to the milky way and to the similar systems that are. Dwarf galaxy - wikipedia, free encyclopedia, A dwarf galaxy is a small galaxy composed of up to several billion stars, a small number compared to our own milky way's 200–400 billion stars. the large magellanic.