• Ghost33313@kbin.social
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      1 year ago

      Remember that the world is tilted as it rotates. The “rays” are from the earth’s rotation at an angle changing the sundown time on an axis.

        • ChaoticNeutralCzech@feddit.de
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          1 year ago

          This is absolutely not Mercator (otherwise, meridians would be all vertical and the Polar Circle a straight horizontal boundary), and the diagonal lines do not quite appear straight.

    • apex32@lemmy.world
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      1 year ago

      The timezones are the thick grey lines on the map, and you can see they are causing breaks in the “rays”.

      I’m not sure what’s causing the rays.

      • ArbitraryValue
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        1 year ago

        Going south makes the earliest sunset happen later (because every sunset happens at the same time at the equator) and going west within a timezone makes it happen later too (since the sunset moves from east to west). Put those together and you get the diagonals.

    • ironhydroxide
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      1 year ago

      They’re caused by how the data is split on the half hour. ±1min changes color drastically.