Far out in the Saturn system, a small world refuses to behave. Iapetus spins in a way that should not be so stable, wears a ...

A heart-shaped pattern forms on the moon due to light and shadow. This "lunar heart" is near the Apollo 15 landing site. It's best viewed when the moon is about 48% illuminated. The pattern is created ...

The Moon exerts a constant physical influence on Earth through gravity, light, and orbital interaction. Its mass shapes ocean ...