This was the first spacecraft to land on the moon's far side, often called its "dark side." In the years since its historic ...

Each evening, enjoy a sweeping view of four planets at once. Also look for Mars occulted by the Moon and meteors!

When we got together to discuss how old the moon really was, having those multiple perspectives turned out to be crucial. At a conference in Hawaii in the late 1980s, a group of scientists solved ...