Must see
A journey from 10 million light years to 100 attometers. ( requires java enabled browser )
http://micro.magnet.fsu.edu/primer/java/scienceopticsu/powersof10/index.html
A journey from 10 million light years to 100 attometers. ( requires java enabled browser )
http://micro.magnet.fsu.edu/primer/java/scienceopticsu/powersof10/index.html