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'Gravity is caused by the rotation of the earth'
apparently that's what they taught back when she was a kid
But how even?!
Well that's how it works in Larry Niven's Ringworld and also Halo. They just thought the earth was a ring.
It was either in one of the books or an easily missed line in Halo 1, but the Halos actually don't spin fast enough for the amount of surface gravity they have, implying artificial gravity is involved.
Halo arrays and RIngworld work because objects in frictional contact with the inner side of the boundary material are imparted linear velocity by the motion of the structure, that's not at all how it works on planets.
Even if Earth were tide locked to the sun it would still have the same exact degree of pull on other mass-having bodies. A ring array that stops spinning has occupants who experience free fall
Here's another fun fact: A ringworld exerts zero net gravitational force on anyone inside of it. It's one of the implications of shell theorem.
not exactly true, a sphereworld this would be thecase
Around the edges of the ring structures you would get minute tidal effects
Not if the ring curves inward at the edges, conforming to a section of a sphere.
Which neither the HALO arrays or Rimworld do....
Not really unhinged just ignorant.
Maybe cause The force can simulate gravity. That's why you see rotating stuff in sci-fi.
Maybe they mixed it up with magnetism? Because our magnetic field is due to the rotation of the earth's iron-nickle core.
No, she specifically stated gravity and when she was being educated, geologists weren't even aware that earth had a separate, differentially spinning core.
Also this was Florida so our schoolbooks were 50 years out of date too