/sci/ - Science & Math

>>8282477
The balloon example is good for demonstrating expansion of a 2D universe. Just as this pic is a good example of how gravity works in a 2D universe. The impression in the fabric is imperceivable to those existing within the 2D place of the fabric, but it's still there and still has and effect on them. Same way the volume in a balloon is imperceivable to those in a 2D universe. Now to be able to visualize how the expansion of space and gravity works in 3D you need to be able to visualize 4 dimensions.