Although the airless Moon experiences no weather analogous to terrestrial weather, conditions there are nothing short of extreme. This video segment recounts some of the experiences Apollo 16 astronauts had as they...

Galileo pioneered astronomy as the first person to study the celestial objects through a telescope. His observations, including the discovery of moons around Jupiter, helped revolutionize the way people thought about the...

This web application shows the phases of the Moon for each day of a selected month from any given latitude and longitude. The calendar can be set from 3999 BC to 3999 AD. Each day can be looked at individually, or can be...

This exercise has students use a simple physical model of the Earth, sun, and moon to understand why the moon changes phases from the perspective of Earthly observers. Students hold up balls representing the moon in a...

This site contains a series of visualizations of the sun, moon and Earth System and how they relate to the changing face of the moon. Animations are in the form of Java applets, forms for field observation of the moon,...