Astronomical Calendar: Sun and Moon Ephemerides and Twilight Calculator
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The Astronomical Calendar is a software package for automated calculations of the celestial coordinates (ephemerides) of the Sun and Moon. It computes the times of sunrise and...
天文日历（Astronomical Calendar）是一款可自动计算太阳与月球天球坐标与星历表（ephemerides）的软件包，能够计算日出时刻及……
