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apr 1, 1666 - Giovanni Domenico Cassini, a French astronomer, observes that Mars has several "white patches" resembling polar caps. Challenges Hyugen's estimate and claims that Mars' full rotation consists of 24 hours and 4o minutes.

Added to timeline:

28 Jan 2018
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History of Mars by Juan Centeno

Date:

apr 1, 1666
Now
~ 358 years ago

Images:

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