Aciqra is an open source virtual planetarium and sky map program. It has the ability to track nearly 120,000 stars, the 8 planets, all 109 Messier object, the sun and the moon from any location on Earth to an accuracy of 1 degree for the next 50 years. It also includes a wealth of built-in tools called "widgets" which include a solar system viewer, an eclipse/transit predictor and a conjunction engine. More info »
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