What is heavy - What is space?

weak or strong interactions
heaviness or lightness
(choose)

weakly interacting heaviness
strongly interacting heaviness
weakly interacting lightness
strongly interacting lightness

Everything inside of these quadrants
is everything
for some bit of time.
(Though weaker interactions and much of heaviness isn't really experienced, just known...
with the strongest interacting heaviness being at the edge of experience.)

Both lightness and strength in interactions qualify the content of our experience
leaving all of the rest below a horizon of knowable.

forces, particles, and fields
Sean Carroll answers that it's all continuous and waves.
cool
Imagine the lightest, least interacting space.
It's the other extreme of experience :-)

Weak interactions must be lightweight in our world.
Heavyweights will interact strongly in our world.
Most happens in the area of more strongly acting unheaviness.
Sounds like tickles with a feather.