Ok, let’s use that example. So imagine you had a large square of rubber and you drew a coordinate plane on it. Then you drew a line segment between points (1,1) and (3,1). You can stretch the rubber until it’s significantly longer, but your line is always exactly 2 units long, even if the rubber stretches.

The thing is, space is the geometry of the universe, it’s what all the various particles in the universe are bound to. Matter isn’t fixed to any point relative to other matter, it’s fixed to a point in space. So if space bends, matter bends with it.

This is how/why orbits work. Gravity is mass warping spacetime. Fast objects like photons sail right on by most stars with their courses barely changed. But slower moving objects like planets are experiencing this local warping of spacetime for a longer period, so it affects them more over time. The thing to note though, is that the planets, and photons are both following newtons first law, they’re traveling in a straight line unless acted upon by another object. The reason the planet orbits the star is that the star has warped space such that (given speed the planet is traveling) an orbit is a straight line.

Not the swedish chef? Think about it… could be good.

Another problem is that the laws of cosmic expansion affects the wire itself. There would be no tugging force between the two bodies. Connecting the two bodies imposes a constraint on them, disrupting the Hubble flow.

This was my first thought on the matter. My understanding at least, is that the expansion of the universe is not really galaxies moving away from each other, but rather the space between the galaxies expanding (stretching). So if a mythril wire ran far across that space between galaxies, one of two things would most likely happen. Either the space would not expand almost like it’s pinned in place by the existence of matter in that region, or the space would continue to expand and the mythril wire would appear to stretch with it, though actually it would be remaining entirely still, either way, the wire would not be unspooling at all.

Ok, I get that. But what’s the water for?

My in-laws are coming to stay in our spare room for the holidays. They’re old and getting to be a bit frail these days, what should I put in their room to make them more comfortable?

Well… his recordings are great?