'Only in the Religionist NewSpeak dictionary." No Mr. Bill. Dark matter and dark energy are invisible by definition.
"Is the internet invisible?"
Even if you define the internet at the level of the electron, an electron is visible as is electromagnetic energy. Dark energy and dark matter are not.
Electromagnetic energy is only evident by effect. The same is true for so-called "dark" energy - which is evident by effect, gravitational effect.
But then, that reality undermines your dogmatic supposition of a 6000 year old universe.
Meanwhile, some of us have looked beyond such dogmatic splinters -- toward deconstructing the effect of same in causing the rejection of the Gift of Reconciliation that has been provided by Nature's Creator.
You'll just have to get used to the fact that we old-Earthers are still reconciled to our Creator - despite your master's efforts to the contrary.
Meet the New Boss, same as the Old Ba'al
--The Who?
No Fleece for YOU!