Boötes II

Discovered in 2007 through data from the Sloan Digital Sky Survey, Boötes II is an ultra-faint dwarf satellite galaxy of the Milky Way situated in the constellation Boötes. Classified among the least luminous galaxies, it presents a challenging target for observation due to its faintness and sparse stellar population. With an absolute magnitude of approximately -2.5, Boötes II is characterized by its relatively small size, boasting a half-light radius of about 44 parsecs. Composed of old and metal-poor stars, indicative of its early formation, the galaxy lacks young stellar components. Expected to be dominated by dark matter, Boötes II contributes to our understanding of the distribution of dark matter in the universe.