火星逆行
See Explanation. Clicking on the picture will download the highest resolution version available.
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retrograde
天文·每日一图
火星的Z字形逆行轨迹
2023年4月15日 When Z is for Mars Image Credit & Copyright: Tunc Tezel (TWAN) Explanation: A composite of images captured about a week apart from mid August 2022 through late March 2023, this series traces the retrograde motion of ruddy-colored Mars. Progressing from lower right to upper left Mars
天文·每日一图
2020年夏天的土星与木星
2020年12月12日 Saturn and Jupiter in Summer 2020 Image Credit & Copyright: Tunc Tezel (TWAN), Onur Durma Explanation: During this northern summer Saturn and Jupiter were both near opposition, opposite the Sun in planet Earth’s sky. Their paired retrograde motion, seen about every 20 years, i