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Almanac
Almanac calculates the equatorial coordinates of the sun, the moon, and the planets. From these it calculates the times of rise, set, and meridian transit for each of these celestial bodies. Additionally, it can calculate the times for twilight
Magic mnemonic
Mnemonic game, you can improve your facilities of human mind concentration word and digital mnemonic memory. You needn't practice sophisticate exercises; it is just enough to study this training.
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