Tucana Dwarf

The Tucana Dwarf Galaxy (aka PGC 69519)is a dwarf galaxy in the constellation Tucana. It is very isolated from other galaxies. Its location on the opposite side of the Milky Way from other Local Group galaxies makes it important for understanding the kinematics and formation history of the Local Group, as well as the role of environment in determining how dwarf galaxies evolve. It is likely to have evolved in isolation for most of its history.

The Tucana Dwarf contains only old stars, formed in a single star formation era around the time the Milky Way's globular clusters formed. It is not experiencing any current star formation, unlike other isolated dwarf galaxies.

This dwarf does not contain very much neutral hydrogen gas. It has a metallicity of -1.8, a significantly low number. There is no significant spread in metallicity throughout the galaxy. There does not seem to be any substructure to the stellar distribution in the galaxy.