What planet has the longest day?

By Forinfos - 08/09/2025 - 0 comments

Venus has the longest day of any major planet in the solar system, taking 243 days to complete a full rotation along its axis. Due to its slow rotation, Venus has a day that is longer than its year.

Venus rotates in the opposite direction of the other planets. Due to its unique rotational direction, the time between sunrises on Venus is just under 117 Earth days. Theory regarding the rotational direction of the planet suggests that Venus once spun in the same direction as the other planets, but some event, such as extremely strong atmospheric tides due to the sun's gravitational pull, occurred in the past that caused it to flip its axis 180 degrees.

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