Quote fromOkay, no I'm still right. Even with the limit on world size, the sun would have to travel impossibly fast OR the world would have to spin with impossibly huge centrifugal tensions. Here is the math:
1) The distance you can see is about 250m in either direction. So if the world can be 8times the size of Earth, and it has to be 500m wide at all points, the maximum length of a world in MC is 8 million kilometers long.
2) The sun can be seen with and moves at the precision of one pixel on my monitor, and the sky is about 3 monitor heights across = 3000+ pixels for me. This means I am able to detect a change in the sun's apparent angle of 0.06 degrees at noon.
3) We can thus construct a triangle and determine at least how far away the sun must be from me in order for its apparent angle to not change. If this distance is too far for the sun to travel up and down in one day at the speed of light, then we have a problem (under the geocentric hypothesis. There are other problems for heliocentric - see below):
X = 8 million km / (sin(0.06)) = 7.6 billion km
Even if the sun rose straight up and down (it doesn't. it moves in an arc which would take way longer than going straight up and down, but I'm being VERY generous), it would take 14 hours to travel this distance and back. In actuality in game, it only takes 10 minutes.
Which means the sun is moving at well over 100 times the speed of light to make it's journey, if we are geocentric.
If we are heliocentric, and we are assuming the earth is spinning and the sun is staying still? Well then, imagine the world is rotating around its center axis, then the furthest point on the map is 4 million km away, and has to sweep out an arc length of pi*(4 million*2) km every 20 minutes, or over a million km per minute.
This is about 5% the speed of light. Okay, so far so good. But what is the centrifugal force of that mass moving at that speed?
Just take the last 50 meters of the earth. About 60 meters deep of feldspar x 500 meters wide by 50 meters long = 1.5 million cubic meters * 2,550 kg/m^3 = 3.8 billion kg
Which is 274,550,000,000,000 N of force, enough to yank the entire cross section of the world's solid rock apart from raw tension. And that's just the last 50 meter's contribution to the tensions!!! There are 4 million km in each direction spinning around!
(In this world, of course, I would travel east-west to make my point, not north-south. A long east-west world would have to spin end over end, causing these problems.)
Assuming MC gold weighs the same in MC as IRL, Minecraftians can lift 400,000 metric tonnes of gold. That's about the same weight as a 747 boeing jumbo jet at take off. They can also run at 14kmph while carrying this weight. I think it's safe to assume the materials their planet is made of is rather strong.