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Herman Yeung – DSE Physics Astronomy & Space Science 天文學 08 (Retrograde motion 逆行運動2)
https://people.highline.edu/iglozman/classes/astronotes/retrograde.htm …
Herman Yeung – DSE Physics Astronomy & Space Science 天文學 08 (Retrograde motion 逆行運動2)
In this video
https://people.highline.edu/iglozman/classes/astronotes/retrograde.htm …
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