The fire department came and opened the fire hydrant. A yellowish water came out. It left a yellowish brownish dust after the water evaporated. Should I be concerned? I saved some of the water.
Everyone knows it's turtles, turtles all the way down.
The question is meaningless in words, since the expansion can only be properly expressed in math.
Kiddie, BRK first alert are the main players. Go BRK and be sure it has a photosensor.
Its not expanding into anything. Spacetime is curved, so all directions eventually lead back to the same point, and there is no centre and no boundaries. More specifically, there is no edge of the universe, where the last galaxy looks out into some sort of great empty void! The space between each galaxy is expanding or inflating. It is not really possible to visualise 3D space being circular. The only way is to flatten one of the dimensions, so that the universe can be drawn on a sheet of rubber. This rubber sheet is not flat, but is shaped like a sphere or balloon. It expands, like a balloon being inflated. So if you look at galaxies marked by dots on the surface of the balloon, as the balloon inflates they move farther and father apart. So, to explain it another way, think of any cube of empty space 1 by 1 by 1. It is expanding in size, not by pushing the neighbouring cubes apart, but by creating more space within itself. If the neighbouring cubes contain matter, then they appear to be moving apart but the movement is just an illusion, the distances are growing without the objects having any velocity. Yes, its all rather anti-intuitive! But then humans see things all wrong anyway, I know the earth is spinning on its axis and revolving around the sun, but I don't feel that process in any way, from my perspective the sky is cycling.
