Question:

Not how many "days" in a year but how many "rotations" of the Earth in a year

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- the movement around the sun creates an extra day in itself. So is that 364 and a bit rotations?

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  1. Due to the Earth's orbit around the sun, it rotates slightly more than

    one time for each solar day (noon to noon or midnight to midnight).

    That means for every year (one orbit around the sun) the Earth

    rotates 366.24 times on its axis, but we only see 365.24 days.

    We have a leap year every 4 years to make up for the extra 0.24

    day (about ¼ of a day).

    Hope this answers your question.


  2. 366.25636053 rotations per year

  3. The time it takes for Earth to orbit the sun is:

    365.25636042 solar days (that is if you measure a day as noon to noon - i.e. from the sun at highest point to the next time its at highest point)

    This is longer than a calendar year because of precession and we measure a calendar year from Spring Equinox to Spring Equinox, which is not quite 360 degrees (it's ~20 mins shorter)

    look up solar day and sidereal day on wikipedia

    A solar day (noon to noon) is not the same as the Earth turning through 360 degrees

    So the number of earth rotations in one orbit is 366.25636042 earth rotations

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