Greatest Discovery, possible?

It is claimed that all should be detected as X-Rays, etc. make virtually all transparent.

It is said the Planck Satellite 'mapped' the universe.

Yet, all is not known. The inception 'point' of the cosmos is not located, and what did the cosmos expand onto is not known and still isn't despite X-Rays, etc. that should show all. Those should be unimpeded, yet the frontier of the universe and what lies beyond it is not identified. What is its nature? Time should not be a barrier.Can these afterall be impeded or turned back? Can something beyond our cosmos frontier be discerned, not inferred but detailed?

Topologically, if the known universe's presence is presently described as  being in a narrow constraint, even like a knife edge, then what is the nature that is outside that?

Haven't come across an answer yet. Or is just a big nothing? Does that mean that what lies outside the frontier of our universe is "bigger"?

Some hold the cosmos started from a tiny spot or singularity. If so, then when our cosmos broke into existence, it broke onto something that was bigger in a sense, since the "big bang" started as a miniscule size and broke into something bigger that surrounds our cosmos that leaves it apparently smaller

, however vague it may be.