These small galaxies are somewhat hard to detect in or near the plane of the Milky Way (thus, the uncertainty about the ...

Abell 2256 is a rich cluster lying in Ursa Minor. It contains more than 500 members ... which contains fewer than 100 galaxies. The brightest galaxy in Abell 2256, NGC 6331, glows meekly at ...

These small galaxies are somewhat hard to detect in or near the plane of the Milky Way (thus, the uncertainty about the number); one such galaxy is the Ursa Minor Dwarf Galaxy. It was discovered ...