I have suspicion that the expanding nature of the universe is due to the spin of galaxies. There’s a right hand rule which says that if the fingers are lined up with the spin of an object, a thrust is created in the (thumb) at a 90 degree angle to the plane of rotation.
Picture Your right hand holding a bottle, fingers together & wrapped around the bottle, with thumb pointed up, perpendicular to fingers. This acceleration force is what keeps gyroscopes standing.
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