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The longest day
By Yugnat on 2009-05-26 18:02:17   


On Venus, a day is longer than a year.

Details :

This is true considering sidereal days, as Venus needs 243 terrestrial days to rotate around itself, and 224.7 to complete its revolution around the sun.
A Venusian year thus lasts 0.924 Venusian day.
Yet, because of the retrograde rotation, the revolution of the planet around the sun is added to its rotation and a solar day (the time between two sunrises) lasts only 117 terrestrial days.

Sources :

Wikipedia – Venus