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TopDownloads4U - Software Review ALCYONE EPHEMERIS Alcyone Ephemeris is an accurate and fast astronomial ephemeris calculator covering the period 3000 BC to AD 3500. It calculates heliocentric, geocentric, and topocentric positions of the Sun (Earth), Moon, and planets in ecliptical, equatorial, and horizontal coordinates, with optional corrections for parallax and refraction; rectangular coordinates, velocity, acceleration, apparent diameter, magnitude, phase, lunar libration and more. Category : Science Price : 0.00 Licence : FreeWare Size : 8055 kB Download Home | Submit Your URL | Contact Us Desktop | Business | Games | Internet | Education | Home | | Graphics | Science | Utilities | Misc. TopDownloads4U Free Downloads. © All Rights Reserved (2002-2005). Please refer to the terms of use for more information.