The stardust is a given. As for sunlight, all the energy including somewhat arguably geothermal (using the suns gravity to help form the earth and I guess radioactive material being formed by other stars) comes from the sun and gets converted into chemical energy you eat so you’re stardust animated by sunlight (mainly).

  • Boomer Humor Doomergod@lemmy.world
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    2 days ago

    I don’t know how much but I’m sure at least some geothermal energy is due to tidal forces on the earth.

    Which would make some of it technically lunar power.

    • A_A@lemmy.world
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      2 days ago

      Only when a moon orbits around a planet faster than the planet spin on its axis, then only will this moon transfers its orbital energy to the planet.
      Our planet, by the means of tidal forces, transfers a small part of its rotating energy to the moon’s orbital energy.
      … in this process most of the rotation energy lost by the Earth is converted to heat.

      • Aniki@feddit.org
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        1 day ago

        so … you’re saying that earth will eventually slow down the spinning until its angular velocity equals that of the rotation of moon around earth?

        • teslekova@sh.itjust.works
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          1 day ago

          That is accurate. However, there is also an effect from the Sun. I think the Sun will do it first, but I have not checked.

    • Zephyr@sh.itjust.worksOP
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      2 days ago

      How did the moon get there? Would it be there if there was no sun? It’s a shit argument I know but the moon and its mass is in some form due to the existence of the sun.

      • MangoCats@feddit.it
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        12 hours ago

        “Lunar power” arguably came from the initial condensation of matter spinning into the sun - it’s the stuff that didn’t get sucked into the fusion reaction. Now - where did that kinetic energy come from? Likely supernovae nearby not too long ago…

        • MangoCats@feddit.it
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          12 hours ago

          And neither are powered by the fusion of Sol - they got their energy when the solar system formed out of the ejecta from previous stellar explosions - probably not much “big bang” direct contribution to rotations in the local frame.