In a fictional world that is round, and has no gravity, how would you go about making the water not fall off the planet (Or even people, for that matter?. Is there some kind of futuristic force field that can be implemented to keep the water (and people) in place?
closed as off-topic by Renan, user535733, Mołot, TCAT117, Ash Jun 20 '18 at 15:40
This question appears to be off-topic. The users who voted to close gave this specific reason:
- "This question does not appear to be about worldbuilding, within the scope defined in the help center." – Renan, user535733, Ash
I am assuming by round, you mean "flat-earth".
Just have the planet not be perfectly flat, but rather a dinner plate shape with the lip. Have the water and the people be inside the lip and you are fine.
Finally to explain the people/water sticking to the plate. Have you looked into the high tier pseudoscience that is "Universal Acceleration"?
According to Flat Earth Theory, gravity is not the main force keeping us on the ground. Instead, there is a force that produces identical effects as observed from the surface of the earth. This force is known as "Universal Acceleration" (abbreviated as UA).
Objects on the earth's surface have weight because all sufficiently massive celestial bodies are accelerating upward at the rate of 9.8 m/s^2. The mass of the earth is thought to shield the objects atop it from the direct force of UA. Alternatively, it is possible that the force of UA can actually pass through objects, but its effect on smaller bodies is negligible (similar to gravity in RET cosmology, which only has a noticeable affect on very large objects).
You change the way gravity works.
You could get really esoteric or make it something as simple as an invisible sphere like a forcefield containing your flat World and work with that as a start.
Finally dispense with gravity as the main force and scale up atomic forces... you can either make it a tiny subatomic World, or describe the forces any way you like since scientists only have some vague theories. Stick it in another dimension.
All you need is some magic, and your world not to experience any external force, so no acceleration, no orbiting around stuff and no impact from large object (most of this is solved by the lack of gravity, so here's that).
Also, having a star near your planet (which would holds together by actual, full blown magic) might induce currents in the water that will cause some of it to reach escape velocity... namely 0 m/s² in your universe. Oh, and the star is orbiting the planet... all thanks to [totally not gravity], and you even get to choose the name of that fictionnal force!
Houses are bolted to the ground, so are people (actually, don't bolt people to stuff, this process is known to hurt a bit)
Finally, nobody could rely on their sense of up and down, since that doen't exist, so house would not be upside down on the other side of the world. I think people would rely on the horizon to know which way is up, and closing your eyes might induce motion sickness!
EDIT: Well, since you postulate that the earth is immovable, that should mean infinite density, but without gravity I have no idea what that would do.
Oh, it's easy, without gravity, water can't fall. Water is always in a round shape where there is no gravity. It's always great to find another believer. Keep up the good work!
If that's not a good answer for you, I have another! Water is actually tons of nanomachines! They try to hold on to the Earth because they love the Earth. If you remove them from the Earth, they will try to fly back down.