Predictions for artificial satellites
Aristotle and Ptolemy
Copernicus
Galileo
Kepler
Binary star simulation Java simulation of orbits of binary stars (Newton's Laws)
Weight calculator Calculate your weight on other planets and the Moon
Lunar cycle Images of the moon through the lunar cycle
Simulation of Moon Formation Large Impact hypothesis simulation
Black Body java applet Click on different temperatures to see how peak wavelength changes. Also try de-selecting auto-x and auto-y
Spectra of Elements Click on an element's symbol to see its absorption or emission spectrum
Stellar Parallax Watch the change in position of stars as Earth orbits the Sun
Watch the planets move around the Sun! Follow this link to the Inner Solar System and Outer Solar System animations. Check out the orbits of all 67 moons orbiting the planets in our Solar System!
JavaLab for the curious. Collide or cannibalize your own galaxies, explore the expansion history of the cosmos, and more!

SOLAR SYSTEM

Welcome to the Planets Information about planets and spaceprobes from JPL.
Planets of the Solar System More general information about planets.
Galileo mission to Jupiter.
Cassini mission to Saturn.
Mars Exploration Rover mission page.
NEAR mission to asteroid Eros.
Comet Information This page contains information about recently discovered comets.
Comet Crash pictures and movies.
Spacewatch This page contains information about this program which searches for near Earth objects.
Extra Solar Planets Astronomers have discovered planets around other stars. The list lengthens all the time!
Exoplanets encyclopedia More details about exoplanets (planets around stars other than the Sun).

STARS & OUR GALAXY

The Stellar Spectral Sequence. The colors and spectra of stars.
Pulsars Hear them tick!
Neutron stars An introduction to some of their many faces.
Videos of compact objects, including the expected appearance of things in the vicinity of black holes.

OTHER GALAXIES