retrograde motion
To make, or to become axisymmetric
Alternative form of dorsal (“a hanging or canopy”)
(transitive, obsolete) To bathe; to steep.
(astronomy) Motion of a body (either real or apparent) in a direction opposite to that of its normal motion, or to that of other similar or related bodies
観測者たちは、惑星が背景の星に対して逆行運動を示すのを記録し、それが初期の天文学者たちを困惑させた。
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