Venus is often referred to as Earth's sister planet. But if this were true, how can the two planets in some respects be so ...

After Friday's spectacle, a "planet parade" of this size won't appear in the night sky for several years, experts say.

Though the planets are always “aligned,” seeing more than four in the sky is more uncommon. February’s lineup is a chance to glimpse all seven in one sweeping view. Planets Venus (top ...

Join the Planet Planners and use your geography decision-making skills to deal with challenges including volcanic eruptions, earthquakes and coastal erosion. Your aim is to play five rounds ...

Ask almost anyone which planet has rings around it, and you’ll get the answer “Saturn”, especially if they’ve ever viewed it through a telescope. But not many people know that the other gas giants in ...