The International Astronomical Union (IAU) defined a dwarf planet in 2006 as a celestial body that orbits the Sun, is round in shape, but has not cleared its orbital neighborhood of objects of ...

Discover why stars twinkle at night! Learn how Earth’s atmosphere bends starlight, why planets shine steadily and explore ...

The ancient Greeks proved over 2,000 years ago that the Earth was round and figured out how big it was by using simple observations of the Sun. But how do people know this today? When you drop ...

For a very long time, Saturn was thought to be the only planet in our solar system with rings. The rings around Saturn were discovered by an astronomer called Galileo Galilei nearly 400 years ago. He ...

University of Regina provides funding as a member of The Conversation CA-FR. University of Regina provides funding as a member of The Conversation CA. Curious Kids is a series for children of all ages ...

History, A+E Networks’ brand dedicated to world wars, historical dramas, reality television and ancient aliens, is now catering to children with Planet H. Dan Suratt, the executive vice president of ...