Young historians turn into detectives in a thought-provoking activity on the Challenger Explosion. The activity uses an image of President Reagan watching the Challenger explode on live TV to help academics practice historical analysis....

This is the interactive ebook "How I Became an Astronaut: The Story of Stephanie D. Wilson." It provides a short biography of her childhood interests, her education, and training to become an astronaut.

Besides an introduction to exhibitions and events at the museum, the site provides a guide to stargazing, an astronomy FAQ, space news, virtual tours (see site map) and research resources (including Chinese-English star and constellation...