ultra-diffuse

== English == === Alternative forms === ultra diffuse === Adjective === ultra-diffuse (comparative more ultra-diffuse, superlative most ultra-diffuse) Extremely diffuse. (astronomy) Specifically, designating a type of galaxy with a very low proportion of visible stars compared to the Milky Way, and hence a very low luminosity. 2016, Van der Burg, Muzzin & Hoekstra, ‘The abundance and spatial distribution of ultra-diffuse galaxies in nearby galaxy clusters’, Astronomy & Astrophysics: In the next sections we study the properties of galaxies that satisfy our criteria to be ultra diffuse, and consider the contribution from galaxies in the fore- and background using the CFHTLS fields. ==== Derived terms ==== ultra diffuse galaxy