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Giovanni Domenico Cassini: Revision history


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  • curprev 01:3301:33, 14 May 202277.180.107.63 talk 23,444 bytes −7 Cassini could not have determined the rotational period of Venus because there are no observable features that could have acted as reference. All you see when you look at it is the top of the clouds and they are of a very uniform color. Moreover, they move with the wind, so they cannot be used as reference. The rotational period of Venus was only determined in the 20th century once we could see the surface of the planet using radio waves. undo

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