Pocket PC application simulating the night sky
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Orionic is an interesting tool which allows you to see the night sky in its current position.
Once you have inputed your geographic details (latitude, longitude and time), Orionic simulates, on the screen, the night sky including stars, planets, galaxies and other celestial bodies you should be able to see from your current position.
With a system for remembering the bodies you can see from your region, this is a great tool for the amateur astronomist.