The dwarf planet Haumea has two known moons, Hi'iaka and Namaka. They are named after the daughters of the Hawaiian goddess of fertility and childbirth, "Haumea". "Hi'iaka" was the goddess of dance, and "Namaka" was the goddess of water and the sea. The two moons were discovered in 2005 by the telescopes at the W. M. Keck Observatory in Hawaii.