The rusty world is full of mysteries—and some of the solar system's most extreme geology. Learn more about Earth's smaller, colder neighbor.

Discover interesting facts about Saturn, its rings and whether it could contain extraterrestrial life.

Discover interesting facts about how Earth formed, what it's made of and more.

The Planet Parade of 2025 is a truly extraordinary celestial event that has stargazers excited. From January 21 to mid-February, six planets will align in the sky: Venus, Mars, Jupiter, Saturn ...

The fifth planet from the sun, Jupiter is what watercolor dreams are made of. Vibrant bands of clouds ripple around its thick atmosphere, making up a world so large that more than 1,300 Earths ...

Here are some Earth Day facts about our planet for you to ponder today. All 23 hours 56 minutes and 4.091 seconds of it, that is.

That means if all the planets were put together (including Jupiter) as well as all the asteroids it will only make up about 0.14 per cent of the Solar System’s mass.

Interesting facts about the planet Venus Venus, the second planet from the sun and Earth's nearest planetary neighbor is an oddity in many ways. The hot, hellish planet spins backward and might ...

Mercury is putting on a show for skywatchers in the evening sky after sunset. But how well do you know the planet Mercury? Here's some Mercury trivia to ponder while planet gazing.