This educator's guide with activities promotes problem solving, communication skills and teamwork. Topics include lunar geology and regolith, distance to the moon, Apollo landing sites, and life support systems. Some of...

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 used thought experiments to test many assumptions, including the notion that heavy objects fall more quickly than lighter objects when they are dropped. Lacking access to either a vacuum chamber or a planetary...

Before the 17th century, people generally believed that Earth was at the center of the universe, a system originally developed by Ptolemy. Galileo, however, was not afraid to challenge existing beliefs when he published...

Authored by Jurgen Geisen, this site has more than sixty-five Java applets. The interactive resources provide detailed solar and lunar data and the daily and annual path of the sun and moon for any location. More...