>>>So how do the Moon and the Sun stay up there? Giant strings?
Probably the same thing that keeps the translucent gaseous orbs around the sun, which periodically cause the eclipse. https:// www.hooktube.com/watch?v=iH5tJ_gpKAo
Buoyancy is one guess.
>>What keeps us stuck to the ground?
Gravity is the artifact of the inflow of ether (in a vertical plane, which is why Michelson-Morley did not get the expected result), into matter, giving it substance.
See: The Evolution of Force - Gustave LeBon 1920