Astronomy
...Picture of Epicycles of Ptolemy
..History of Astronomy
...History of Astronomy
...Tycho Brahe
..Brahe
...The birth of the earth
...Galileo and his work
...History of Kepler
...Planetary Orbits
...Eclipsing binary Stars
                     A Tour of the Solar System
...Planet Data
      The nine  planets and their moons
... Extra Solar Planets....Planets other than ours...circling their own suns
... Find the name of any star visible in the sky...type in date and time and locate it in a star field  
    The Life of Stars....from birth to death
      Stage in the life of a star....details
                               High school physics and chemistry       www.physchem.info
...Watch the Space Station
 Being Assembled
...Retrograde Motion of Mars
...Birth of our solar system:  Movie