Great star map. With a few clicks you can create a star map for your back yard tonight. Other celestial simulations.

Ultimate reference tool. Visit the planets and their moons with NASA space probes. Breathtaking images from deepest space.

Ultimate interactive learning trip to outer space with more than 60 animations, 278 video sequences, more than 400 full-color photos, and hundreds of articles, fact files, and data boxes. Includes star map.

An actual tour of the universe that users control. Control the most advanced technological tools for exploring the universe from a nuclear accelerator to the Hubble space telescope.