Cythera is a moon of the planet Venus, named after the Greek island associated with the goddess Aphrodite. It is part of the Galilean moons and is known for its unique geological features, including large plains and highland regions. The moon has a surface covered with a mix of ancient and younger terrains, indicating a complex geological history. Cythera is also of interest to scientists studying planetary formation and the evolution of celestial bodies in our solar system.