The USGS and NASA have teamed up to bring the public stunning images of the Earth taken by the Landsat-7 satellite and the Terra Satellite's Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER)....

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,...

This web page, authored and curated by David P. Stern, describes the precession of the Earth's axis of rotation relative to the stars. It describes the discovery by the Greek astronomer Hipparchus that the position of...

This set contains images with information about: Our Solar System, the Sun, Mercury, Venus, Earth, Moon, Mars, Asteroids, Jupiter, Moons of Jupiter, Saturn, Uranus, Neptune, Pluto and Charon, and Comets.

The website Solar System Live includes applets showing the positions of the planets. One can see all of the planets in the solar system or just the inner planets. Visitors are encouraged to compare the view of the inner...