Cosmological problem

Jonathan Silverlight wrote:
In message , J. Scott Miller
writes


1) No telescope we can invent can detect radiation closer to the
moment of the big bang than the surface of last scatter. This would
represent the era when the density of the universe was much as that of
the surface of a star. Just as we cannot see inside the Sun, we
cannot see beyond the point where the temperature and density of the
universe was this high.


Is there any radiation, or anything else (gravitational radiation ??)
that would let us see deeper? We can see all the way to the Sun's core
using neutrinos, for instance.

At this point in time, we lack the technology or know how to detect this
background of neutrinos and antineutrinos. It is thought they may be at a
slightly cooler temperature than the CMBR (about 2K vs. 3K) and should pervade
the universe (which became transparent to them about 2 seconds into the universe).

And, gravitational waves also remain elusive.

So, for now, we are stuck with what we can observe and are attempting to gather
from it how the universe might have been at early epochs and how it has changed
since.