jan 1, 1840 - Wilhelm Beer and Johann von Maedler's discovery
Description:
Wilhelm Beer (1797 - 1850) and Johann von Maedler (1794 - 1874) observe Mars over periods of 759, 1604, and 2234 days, and determine that the rotational period of Mars is 24 hours, 37 minutes, 22.6 seconds, which is surprisingly close to the currently accepted value of 24 hours, 37 minutes, 22.7 seconds.
Added to timeline:
VIS 41 Mars Timeline
VIS 41 Assignment 2
Date:
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