A collection of down-to-Earth facts about our planet and its place in the solar system. This collection introduces the Sun as the main source of light and heat on Earth. It explains that the Earth ...

Try stargazing. Need a new idea to keep kids entertained? Try stargazing. Free learning activities and videos about the solar system Free learning activities and videos about the solar system Free ...

With a radius of 3,959 miles, Earth is the fifth largest planet in our solar system, and it's the only one known for sure to have liquid water on its surface. Earth is also unique in terms of ...

The solar system is the name we use to describe the eight planets, and their moons, that circle, or orbit, around the sun. CHILD: Our planet, Earth, is in the solar system. MADDIE: Mercury is a ...