Lyrid Meteor Shower http://comets.amsmeteors.org/meteors/showers/lyrids.html
Gustav Holst: The Planets Suite (background music) http://www.aquarianage.org/lore/holst.html
See the motion of the planets and sun from the earth or orbits from above. If you set the time period on days you should quickly see the retrograde motion of Mars and Jupiter. http://jove.geol.niu.edu/faculty/stoddard/JAVA/luminaries.html
The (Nine?) Eight Planets http://seds.lpl.arizona.edu/nineplanets/nineplanets/nineplanets.html
Solar System Collisions http://janus.astro.umd.edu/astro/impact.html
Your weight on other worlds http://www.exploratorium.edu/ronh/weight/index.html
View and download pictures from the Hubble Space Telescope http://hubblesite.org/newscenter/archive/