The Earth Space Simulator (ESS) is a learning tool designed to encourage hands-on experimentation and observation. With a tiny Earth globe in the center, a transparent shell for the Sun and other stars, plus a flat ring for the local horizon, the ESS models what we see in the sky by day and night.

Recommended activities/models :

• Sunrise and sunset positions.
• Using the sun to track time.
• Longest and shortest days.
• The ecliptic (path of the sun during the year).
• Star trails in the night sky.