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The National Human Genome Research Institute has a great talking glossary of genetic terms for students. The glossary is available online and as a free iPad app. The Talking Glossary of Genetic Terms features scientists explaining each term. Most terms are accompanied by an illustration and some terms are accompanied by 3D animations.

Stellarium is a free open source planetarium for your computer. It shows a realistic sky in 3D, just like what you see with the naked eye, binoculars or a telescope.It is being used in planetarium projectors. Just set your coordinates and go.