A website all about planetary mysteries—it's a one-stop-shop for all things, stars, planets, and space travel. Scholars read an astronomy overview to discover the page's big ideas, then choose from the plethora of resources, including...

Go study the universe. Pupils learn seven aspects about astronomy and astronomers. They begin to learn about constellations; distance and motion between objects; gravity; the electromagnetic spectrum; dark matter and energy; and teams of...

This illustration from the Lunar and Planetary Laboratory shows the approximate sizes of the planets relative to each other. Note that the planets are not shown at appropriate distances from the Sun.

This site is astronomy for kids and teachers! Here students can learn about the planet Earth of the Solar System including fun facts, mass, day, year, and distance from the Sun.

Kids learn about the planet Saturn of the Solar System including its rings, mass, day, year, and distance from the Sun. Astronomy for kids and teachers.

NASA site features a lesson plan that teachers can use to help their students see how far they are from each of the planets.

Conversion calculators galore! Convert just about anything from one measureable unit into another measureable unit here with over two dozen calculators. Each of the links is specific to a measureable quantity. Some examples include...

Want to know what the current weather conditions are in space? Find everything here you may want to know about the latest solar flares, sunspots, asteroids and more. Site also includes essential web links to quench any user's thirst for...