this post was submitted on 12 Jul 2026
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Showerthoughts

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A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The most popular seem to be lighthearted clever little truths, hidden in daily life.

Here are some examples to inspire your own showerthoughts:

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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).

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[–] Semi_Hemi_Demigod@lemmy.world 3 points 3 days ago (2 children)

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 2 points 3 days ago* (last edited 3 days ago) (1 children)

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.

[–] gandalf_der_12te@feddit.org 2 points 3 days ago (1 children)

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 2 points 2 days 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.works 1 points 3 days ago (2 children)

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 1 points 2 days 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...

[–] Semi_Hemi_Demigod@lemmy.world 0 points 3 days ago (1 children)

Tidal forces on earth are a combination of the moon and the sun’s gravity

[–] MangoCats@feddit.it 1 points 2 days 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.