Tour the Solar System: (Interactive site from PBS) With one click, you can visit Saturn, Venus, or the other planets and then spin and explore them in three dimensions. The interface uses NASA calculations to precisely position all celestial bodies. Click the play button at the bottom of the screen to watch the positions of the planets and moon changes as time passes.
In Moonbase Alpha, you assume the exciting role of an astronaut working to further human expansion and research. Returning from a research expedition, you witness a meteorite impact that cripples the life support capability of the settlement. With precious minutes ticking away, you and your team must repair and replace equipment in order to restore the oxygen production to the settlement.
Visit http://store.steampowered.com/app/39000/ to learn more about NASA's Moonbase Alpha and download the game.