1553
Sea Level (europe.pub)
submitted 9 months ago by to c/science_memes@mander.xyz
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Alt text: They're up there with coral islands, lightning, and caterpillars turning into butterflies.

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[–] 1 point 9 months ago (1 child)

a sidereal year is 365.256 days.

No. A sidereal year is 366.24 days.

And 11 days isn't "and some change"

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  • [–] 2 points 9 months ago

    The figures in my post are ephemeris days since that's the way Wikipedia lists them.

    https://en.wikipedia.org/wiki/Sidereal_year

    https://en.wikipedia.org/wiki/Lunar_month#Sidereal_month

    "And some change" is a phrase to refer to a number following a decimal point, meaning the sources I find claim there are thirteen point something sidereal months per year, at a figure too low to round to 14. Here are some example sources:

    https://en.wikipedia.org/wiki/Orbit_of_the_Moon#Lunar_periods

    http://scienceline.ucsb.edu/getkey.php?key=1126

    I still can't find a source which says the moon makes 14 sidereal orbits per year, using any definition of year.

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