Segue 2

Segue 2, discovered in 2009 as part of the Sloan Digital Sky Survey, is an ultra-faint dwarf galaxy situated in the constellation Leo in the northern celestial hemisphere. Renowned for its extremely low luminosity and diminutive size, Segue 2 is among the least luminous galaxies ever identified, posing challenges for observational studies. Its estimated distance from Earth is approximately 35,000 light-years. Dominated by an aging, metal-poor stellar population, this ultra-faint dwarf galaxy, like many of its counterparts, is believed to harbor a significant amount of dark matter. Investigations into Segue 2's structure, dynamics, and evolutionary history have been facilitated by follow-up observations employing various telescopes and instruments.