Canis Major Dwarf Galaxy is a small irregular Galaxy in the Local Group with about a billion stars tending toward Red Giants. It is thought to be the closest galaxy to the Milky Way, about 25,000 light-years from Earth. It was discovered in 2003.
Some consider it not to be a galaxy.
Large Magellanic Cloud (LMC)
Local Group (LG)
Sagittarius Dwarf Elliptical Galaxy (Sgr dE)