Nicolaus Copernicus developed the theory of Earth's orbit around the sun demonstrated in this science simulation.

Why do some regions experience full-time heat while others are reckoning with frigid temperatures and snow? And why are the seasons reversed in the two hemispheres? Rebecca Kaplan explains how the shape of the Earth's orbit around the...

Experience a science simulation illustrating the Copernican theory of Earth's orbit around the sun.

A video and a short multiple-choice quiz on how the Earth's tilt on its axis, its rotation, and its orbit around the Sun give us a 24-hour day, a 365-day year, and our seasons.

Find out what the seasons are and how they change. Through the use of excellent graphics, content explores the Earth's orbit around the sun and how sunlight reaches the earth at equinox and the winter solstice.

[Free Registration/Login may be required to access all resource tools.] How objects in the solar system orbit around each other.

[Free Registration/Login may be required to access all resource tools.] How objects in the solar system orbit around each other.

[Free Registration/Login may be required to access all resource tools.] Orbital motion and why it occurs, and the orbits of the Earth around the sun and the moon around the Earth.

A slideshow exploring Earth's rotation and revolution around the sun. Learn that because of Earth's axis tilt we experience the seasons!

A learning exercise regarding the path of the Sun around the Earth and the Earth's tilt on its axis.

This site from the National Aeronautics and Space Administration provides a fun project on rockets. "Nothing in space stands still. Everything either orbits around something else, or moves toward or away from something else. So how do...

The focus of this series of lessons is to engage students in an exploration of the world around them. The emphasis is on inquiry as students learn about the earth, sun, light, shapes and more.