Here are two brief demonstrations that I find useful in teaching planetary astronomy. The latter was inspired by a segment on the Nova series of public television programs, which is always a source of ideas for visually presenting science.
Iowa Science Teachers Journal
© Copyright 1990 by the Iowa Academy of Science
Iowa Science Teachers Journal: Vol. 27
, Article 8.
Available at: https://scholarworks.uni.edu/istj/vol27/iss3/8