Our Sun is an ordinary star; however, as our own star, it holds special status for us and is essential to our existence. The Sun's gravity holds the solar system together, and nuclear fusion within the Sun supplies the...

This website contains basic information about Galaxy Clusters and their properties. Includes a brief explanation on how to apply the Virial Theorem to calculate a Cluster's Mass, and how the Theory of Dark Matter derives...

This educator's guide was developed with the Cosmic Questions national traveling exhibit. It contains activities relating to the exhibit's theme, our place in space and time-and information about the exhibit. Although...

This PDF document consists of lesson plans and an activity which is composed of a three-part questionnaire that launches students on discussions about where objects in space are located, and when they were formed- an...

This web page from Professor David Jewitt gives an explanation of kuiper belt objects and comets. It is described at a very basic level and includes links and images.