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Planets: Tour the Solar Neighborhood

Planets: What Exactly is a Planet?

Planets: How Long Is A Day?

Planets: What is a Moon?

Planets: Exoplanets Examined

Planets: Dirty Snowballs and Rocks

  • Tour the Solar Neighborhood
  • |
  • What Exactly is a Planet?
  • |
  • How Long Is A Day?
  • |
  • What is a Moon?
  • |
  • Exoplanets Examined
  • |
  • Dirty Snowballs and Rocks
Planets ['plă-nəts]
Celestial bodies moving in an elliptical orbit around a star.

Scientists are always learning new things about the planets and our solar system. The solar system is home to eight planets and one dwarf planet. They are all different types and sizes. Some are rocky, some are made of gas, some have rings, some have moons, and one is almost all ice. They all revolve around our sun in their own unique orbits.

Find out more about this topic by clicking on the buttons on this page. You can watch our video shorts and other programs by clicking on the links above or by going to Video. Facts will tell you more about the topic. Links will expand your learning beyond our site. Glossary gives you a list of specialized words. Books offer reading suggestions. Games give you a chance to play. Teachers provides materials for educators. Contact us by clicking on the link in the masthead to email us questions or comments. Click for the current season's schedule of programs, and be sure to check out my blog and our 360° videos.

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