A dwarf galaxy is a small galaxy that contains a relatively low number of stars, typically ranging from a few million to a few billion. These galaxies are much smaller than larger galaxies like the Milky Way and often have irregular shapes. Dwarf galaxies can be found in various locations in the universe, including as satellites of larger galaxies. Dwarf galaxies are important for understanding the formation and evolution of galaxies. They often contain older stars and can provide insights into the early universe. Some well-known examples of dwarf galaxies include the Large Magellanic Cloud and the Small Magellanic Cloud, which are both satellites of the Milky Way.