The word “planet” came from the ancient Greek words that mean “wandering star.” That makes sense, because for thousands of years, people have watched planets change position in the night ...

Back to Article List Astro for Kids: Why are planets round? Gravity, mass and centrifugal force all contribute to the final shape of a planet.

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.

Curious Kids is a series for children of all ages. Have a question you’d like an expert to answer? Send it to . “Comet,” “star” and “planet” are category names that immediately tell ...

The History Channel has announced the launch of Planet H, a brand extension targeting kids ages seven to 11 with educational content about history. Developed by History and its parent company, A+E ...

Our solar system's planets vary greatly in size, composition, temperature, chemistry and geology. Here are some notable extreme facts about the planets that orbit our Sun.

Discover interesting facts about Mars, its moons, its atmosphere, and the possibilities of life.