Let us assume that the yellow ball is being sqeezed equally from all directions.
And let us assume that the yellow ball is compressing.
There is at the exact center of our ball a infinitesimally small point at which there can be no compression, just like the epicenter of an Earth quake.
from...
Try thinking about measuring the expansion of the universe based on relativity. That is to say that depending on where you are located in the universe you might measure expansion or you might measure contraction!
Think about this.
The observer is placed anywhere inside of a giant ball of...