Celestial Bodies

Summarize the characteristics and movements of objects in the solar system.

Virtual Solar System Project:  Building Understanding through Model Building (Barab, S.A., Hay, K.E., Barnet, M., and Keating, T.)  Journal of Research in Science Teaching, v37, n7, p 719-756, 2000.
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.132.4918&rep=rep1&type=pdf