• Hadriscus@jlai.lu
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      9 days ago

      Best I can do is more gravitas in my Lemmy comments. not sure it’s enough for the planet to collapse but I can try, if there’s a chance of it ending our current conundrum

  • 667@lemmy.radio
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    11 days ago

    This helps explain why days seem shorter as we age, the Earth is spinning faster due to the conservation of angular momentum. The days are literally shorter.

    • sga@piefed.social
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      10 days ago

      fun fact, days have actually been getting longer pretty much since formation of earth (well moon to be correct). reason iirc is that moon is slowly moving away from earth, and this results in some dynamics changing and as a result earth spins slower. like billions of years ago, it was closer to 23 hours.

      ps - very rusty memory right now, should have skipped writing instead of half borked fact

      • wia@lemmy.ca
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        10 days ago

        You’re correct. There are more factors involved too, including climate change, since more ice melting means more water as well, moving the mass away from poles to the center to also be affected by the mind pull too.

        All the factors end up changing things by about a millisecond per century. The effect is akin to a spinning figure skater having their arms up over their head vs directly out from their body.

  • NottaLottaOcelot@lemmy.ca
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    11 days ago

    The magnetic poles must be moving substantially. Africa has rotated almost 90 degrees in a few short decades!

    • Captain Aggravated@sh.itjust.works
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      10 days ago

      The blue Marble was also photographed “upside down.” We tend to rotate it because the shape of Africa is apparent and familiar. The new shot is taken further West and I think closer to the planet so not as much of its surface is visible.

    • PoopingCough@lemmy.world
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      11 days ago

      Well the second pic is also at night with a high iso and long exposure plus it’s digiral so there’s a lot more noise going on.

      • IMALlama@lemmy.world
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        10 days ago

        Speaking in generic terms, film is way more forgiving of over exposure and digital is way more forgiving of under exposure. A fast lens is always king, but once you hit parity on that I would personally take digital for low light any day.

        • PoopingCough@lemmy.world
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          10 days ago

          Copy that, my knowledge of the specifics of digital vs analog is about exhausted just from what i posted so i appreciate the added information!

        • Buddahriffic@lemmy.world
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          10 days ago

          Digital should be the better for either one because both can be normalized to a normal exposure, in which case over should still be more accurate (assuming a static scene). With film, you open the shutter and then allow light to hit the single piece of film, which makes up your full data for that image. Digital could record time data with the light data and essentially keep a record of the full exposure, which can then be averaged and normalized to the length of the exposure.

          As long as no pixels get blown out by the exposure, linearly scaling brightness would handle the normalization. Though one of those “take 30 pictures real quick” would also work if you average them together, maybe add a little positional correction if the first frame and last frame are far enough apart that the spacecraft has moved significantly in that time.