@Whackadoodle:
There are a couple key differences between a geocentric model and the one in Ohara:
First, but less importantly, as maxdexter explained, the fact that the various orbits don't share a plane.
Secondly, look at the geocentric model you linked. Notice how each object is on a short arm hanging from the long arm from the Earth? That's because, if you view the Earth as unmoving, and everything as orbiting the Earth, during a certain point in the orbital cycle, objects appear to move backwards along their orbits (like this). This is easily observed, and has been known since at least the days of ancient Greece. However, if you look at the model Oda drew, the bodies are attached directly to the hoops describing their orbits.
The model being of a world and its moons would solve both of these problems.
Again if there were many moons, why is it affecting only Enies Lobby and not the entire world? All the Blues would be affected:
- think of the tidal waves caused on the full moon in reality, the tidal bores
- light from the full moons.
IF we think that that model those historians (note they were historians not astronomers) was accurate, which you and others are arguing for by bringing up "the various orbits don't share a plane", then the other moons are big enough and close enough to be seen. As such people in the blue seas would also be affected.
But they are not. They see only one moon in the sky not, 2 or 3 ect.
–- Update From New Post Merge ---
Okay, I've gone and doing some surfing on what realistic affects would be if there was a 2 moon planet (yes there really are some scientific articles on if Earth had a 2nd moon) One article has gotten me thinking, according to the article, the two moons would eventually crash into each other, the planet would be changed and life would have start over.
Note I really do not think this happened but its an mental exercise in 'what if' and trying to find a medium of those that want a multiple moon system and those of the idea of single moon, and the oddity of the OP's world. Not just the Grand line, but why isn't there any continents beyond the Red Line (which has been described as a 'bunch of islands meshed together') but tons of islands, why hasn't plate tectonics smashed those islands together to make continents?
In my mental exercise of blending real world science and One Piece fantasy, it unexpectedly lead to territory that made me want move it to dumb predictions thread. I remembered that space travel is a reality in OP, though not really known (or seems to) to the peoples of the world. Enel did encounter space pirates who had a space ship.
Again I really do not think this happened, but hey I do admit mental exercises on pondering "what if" are fun.
Take a scoop of science reality, a pound of science fiction, blend in a cocktail of fantasy, top with wild speculation to get this=
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What if there once were a 2nd moon (maybe more that were actually small asteroids caught by true moons' gravity but close enough that they were seen with naked eye) to the OP world. In the far distant past, farther than the Void Century (which was mere 900 yrs ago) like billions years ago? a civilization too that tried to make sense of the odd moons phases. With 2 or more moons they wouldn't have an established moon phases . Writings either the odd moon phases or the Moon(s) catching the extra 'secondary moons' could be what inspired the planetary model the Oharans had.
The gravitational forces of these multiple moons caused massive tides that not only make living on the shore line impossible as it causes massive erosion and flooding.
When several of the moons collided, many people had already have escaped some time ago in space ships (hey if Star Trek can have people escape a planet whose star is going supernova then fantasy can deal with this! remember the sci-fi part I mentioned?). The debris rains down not only causing more flooding but fires and other such calamites that alter the face of the world. The world is changed in both climate and geography. Continents are long gone, only islands remain. Save for the massive ridge of land that encircles the world from top to bottom. And now there is only one moon left. (remember the dash of sci-fi and fantasy here and the unrealism is explained away)
Eventually things settle down and people can return, and since this is has a dash of Sci-Fi, they had plants and animals on their space ships (because good sci-fi stories having people escaping end of the world has that in them) to help 'terra-form' the world … that is help re-establish life on the world. They help shape the world. They also have some drawings of the old system that had mentions of multiple moons.
Ages pass by, languages change, civilizations come and go. Oharan historians discover fragments of these drawings but can't read the ancient (so old the so-called Ancient Kingdom mentioned during the Void century seems like young) and remember they are historians not astronomers. Their interest is the history of the drawings and what the images looked like not its scientific accuracy (well by the day's standards that they know of) so they tried to make a model based on the drawings.
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.............. wait one moment.......
"They help shape the world."? Recreate the world? They (claim) created the world?
Why the hell did my fantasy lead me to the old theory of Tenryubito being from space ?? A theory I never have bought before????
And now you see why I say I wanted to copy and paste this in dumb predictions!
Ah hell I'm gonna do so anyway ... after altering it up some. Like saying the world before had space tech, and two forces fought it out and destroyed the extra moons in the process. ... actually it was use one of the ancient weapons.
And it wasn't billions of years but much closer. These two forces resettled the world, one side became the ancient kingdom while the other side had splintered off with 20 generals claiming their own islands as separate but allied kingdoms.
But some sea monsters still existed though are now even larger due to radiation from the blasted moon bits destroyed by the ancient weapon and now are sea kings.
This radiation is also reason for many odd things on the grand line. Though why its concentrated on the equator and not spread out over the globe is a mystery.
The world shattering rivalry lived on until the Void Century when the 20 allied kingdoms finally destroyed their rival. This is why anything dealing with the Void Century is forbidden to be researched. The truth is that the Void Century wasn't a war unto itself but the last battles of a many-century long rivalry. Also it had battle that had two ancient weapons (3rd, mermaid named Poseidon, arose during the Void century) that destroyed several moons.
The WG really doesn't want a repeat of that one war that was worse than the Void Century's battles.
After all there is only one moon left!
Reminder!!= This was made with a scoop of science reality, a pound of science fiction, blend in a cocktail of fantasy, top with wild speculation.
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