Radius of Universe

Is it not risky to use the radius of the universe in the equations? Surely, the radius is limited to how far we can see/sense?
And does the value increase continually to match the expansion?

Welcome to the forum @Strikeclub It depends on what you mean by universe.? If our body is a universe, then what is the radius of your body compared to the radius of your consciousness?

As your mind expands so does the radius of your knowledge and understanding.

You are only limited by the limitation you wish to impose. Does you body end were your skin ends?
just my opinion. hope this helps. :smiley: