Winter, spring, summer, and fall—Earth experiences them all! But what about Mars? Scholars compare the planets in terms of distance, tilt, and rotation during a lesson from PBS's Space series. Great visual models of Earth and Mars, plus...

View photographs of space craft and read about their assembly, launching, and where they went.

View a chart displaying various kinds of meteorites collected on earth and read a technical article describing the manner in which they are studied. Provides a link to more information about the planet Mars and the role it plays in the...

Read interesting facts about the Earth on this fun, easy-to-read site.

Compare the seasons on Earth and Mars with NASA imagery. Use this resource to visualize how the axial tilt of a planet influences its seasons and to compare data about seasonal changes on Earth and Mars. Support materials include:...