Comments: Astrophysical Journal (Letters), in press The nearby Ursa Minor dwarf spheroidal (UMi dSph) is one of the most dark matter dominated galaxies known, with a central mass to light ratio ...

The Hubble Space Telescope has shown that dark matter is concentrated within the core of a nearby dwarf galaxy, a finding that rushes to the rescue of the Standard Model of cosmology. This model ...

Figure 2: An optical image of the Ursa Minor dwarf galaxy from the Digitized Sky Surveys (DSS)* (14 arcmin by 14 arcmin) and the target star COS82.

Earlier this month, we spoke of Ursa Major, the Big Bear, so this week we take a look at the Little Bear, Ursa Minor. Astronomy neophytes sometimes mistake the Pleiades star cluster for the Little ...

A new satellite galaxy discovered orbiting the Milky Way is either an incredibly ancient, soon-to-fragment clump of stars or the most dark-matter-dominated dwarf galaxy ever found.

Astronomers have made a fascinating discovery in the Ursa Major constellation that could potentially challenge our understanding of galaxies and star clusters. The object in question, UMa3/U1, has ...

George Abell's 1958 catalog, later expanded to 4,076 entries, provides a comprehensive list of galaxy clusters. Abell 2256, located in Ursa Minor, is a rich cluster containing over 500 galaxies ...

The Draco dwarf is a faint, star-poor but dark-matter rich galaxy. Here we see Hubble zooming in on some of its stars. | Credit: NASA/ESA/Eduardo Vitral, Roeland van der Marel, Sangmo Tony Sohn ...