The Earth is an infinite plane, Thork, there is no edge, likely or otherwise.
How ridiculous. Infinity is a man made number. It does not exist anywhere in nature at all. The grains of sand on a beach is finite. The stars in the sky is finite. The atoms in the universe are finite. And if the number of atoms is finite, so must be the size of the earth. It cannot go on forever. Also if the earth were infinite, then the earth would be the floor of the universe and the universe itself would have to be infinite stretching out across the floor. Finally all things would be on the floor. All comets, all planets, all stars ... all would fall to the infinite earth. With an infinite earth you can't have UA, as you need infinite power to accelerate an infinite earth. So an infinite floor with infinite gravity, yup, everything would be on the floor.
Infinity only exists in the minds of men. As does this stupid theory. Quite how this infinite earth theory, devised by the drunkard John Davis and followed up by no one has gained any traction on this site, I have no idea. It should have been left with the window lickers on the other site.
There are no texts advocating an infinite earth, there is no historical reference to such a thing, no great minds have ever endorsed such an idea ... it is a thought experiment for idiots. It isn't how the world really is. We should distance ourselves from such low-brow muppetry, else we risk damaging our credibility and world authority on earth's shape.