...
What keeps water in a container? The container?
I'm glad you asked, it's the ridged container gravity creates.
You can prove the ridged nature of gravity yourself just by looking at a hot air balloon. You see the Earth is spinning and the balloon gets pulled along by Earth's atmosphere so, while the balloon is floating in one spot and you're traveling a 1000 miles per hour (at the equator) below it, the balloon remains stationary above you. It's the ridged immovable connection gravity creates between the air molecules surrounding the balloon and the molecules in the ground & water that causes the air to pull on the balloon.
The fact the balloon doesn't move away from you at high speed is proof of this ridged immovable connection. As this example shows the ridged walls of a container are actually the perfect analogy for how the force of gravity pulls on objects.
Perhaps an even better example of the ridged structure gravity creates is, the solid barrier it forms between the pressurized gasses in the atmosphere and the vacuum of space. Without this barrier all the gasses would escape into the vacuum and that proves that gravity is not only real but, it showcases how it works just like a container.
Well on a globe there's a convex dome of water 3 miles out that a ship sails up, over and behind and, the horizon line is the peek of this convex dome.
No. That's just something you made up. A globe is a globe, it doesn't have "domes" in its oceans and ships don't sail "up" on them.
...
"A globe is a globe, it doesn't have "domes" in its oceans and ships don't sail "up" on them."
If you sail from North America to Europe on a spherical object how can you not be sailing up the water at some point? The water surface is never level on your model. Your either sailing up or down (the entire time). Please explain.
It seems the poor boy is a tad bid confused and it's probably my fault for using a poor choice of words. By dome I'm referring to the mound, bulge or hump formed by the convex section of water that conforms to the globe between the two points of an observer standing on the water, and a ship.
On the globe up is relative to gravity. When you look out over the globe everything around you in a 360 degree circle is down hill and the ship is actually traveling down but, since up is relative the ship moves up relative to the point on the curve that forms the horizon. After the horizon ship continues its voyage down hill until it is hidden by the horizon curve.