A short film by Charles and Ray Eames. It was made in 1968.
The goal of this movie is to give you a sense of the scale of
things in the universe. It starts with the size of the
universe (about 1025meters) and progressively zooms
down to the size of sub-atomic particles
(10-16meters).
The movie is 8m 47s long.
There's now an interactive CD-ROM based on the movie and
a pretty good website at
http://www.wordwizz.com/pwrsof10.htm
It seemed like every class in high school showed this film.
The only movie I've probably seen more than the Powers of Ten
is Star Wars.