日行迹
2019-09-28
2019 September 28 An Analemma of the Sun Image Credit & Copyright: Gyorgy Soponyai Explanation: This week the equinox found the Sun near the middl...
冬至
秋分：从冬至到夏至的太阳
2019-09-23
2019 September 23 Equinox: The Sun from Solstice to Solstice Image Credit & Copyright: Tunç Tezel (TWAN) Explanation: Today is an equinox, a d...
时长越来越长的白昼
2019-06-27
2019 June 27 时长越来越长的白昼 影像来源及版权: Gianluca Belgrado 说明：这幅持续拍摄六个月的长曝光影像将从冬至到夏至（2018年12月21日至2019年6月16...