A Day On Mercury Is Actually Longer Than Its Year

Noreen 2

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One day on Mercury (i.e -the time it takes to rotate around its axis once) lasts 176 earth days. A year on Mercury (i.e – the amount of time for Mercury to orbit the sun once) is 87.97 earth days. In that sense, it remains daytime for a full year on Mercury and it stays night for one full year also.

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  1. Nick D January 8, 2013 at 8:34 pm - Reply

    It’s actually Venus… not Mercury.

    • Daven Hiskey
      Daven Hiskey January 16, 2013 at 12:24 pm - Reply

      @Nick D: No, it is Mercury. For those curious, one Venusian year is about 1.92 Venusian (solar) days long.

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