What planet has the longest day?

McGruff

Venus. http://www.zoomwhales.com/subjects/astronomy/solarsystem/extremes.shtml Jul 20 00, 1:16 PM

LtcmdFlash

It's Mercury. Due to the fact that Mercury does not rotate on its axis, the same side always faces the sun, therefore the sun never sets on Mercury. http://www.astrodigital.org/astronomy/mercury.html [Link added March 23, 2008 -- Zbeckabee] Jul 20 00, 6:18 PM

zbeckabee

The planet with the longest day is Venus; a day on Venus takes 243 Earth days. (A day on Venus is longer than its year; a year on Venus takes only 224.7 Earth days). A day on Mercury lasts 58.7 Earth days. http://www.enchantedlearning.com/subjects/astronomy/planets/ Mar 23 08, 8:35 PM

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