标签： phase

天文·每日一图

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金星的蛾眉位相

2023年8月26日 Crescents of Venus Image Credit & Copyright: Roberto Ortu Explanation: Just as the Moon goes through phases, Venus’ visible sunlit hemisphere waxes and wanes. This sequence of telescopic images illustrates the steady changes for Venus during its recent 2023 apparition as our evening star. Gliding along its interior orbit between Earth a...

天文·每日一图

 由 

月相矩阵

2022年10月1日 Lunation Matrix Image Credit & Copyright: Tunc Tezel (TWAN) Explanation: Observe the Moon every night and you’ll see its visible sunlit portion gradually change. In phases progressing from New Moon to Full Moon to New Moon again, a lunar cycle or lunation is completed in about 29.5 days. Top left to bottom right, this 7×4 matrix of...