Ok, I think this will be my last post on this subject.
You question my question my statement that we can't move relative
to what we are a part of. Well, if we can please explain how, I
feel no need to speculate on wild assumptions.
As far as physical infinities are concerned, physicists don't
like them. Whenever a theory produces infinities they tend
to produce effects that are at odds with our observations of
how the world is. So they try to find a way to work around them.
An example is the ultraviolet catastrophe. Classical physics
showed that any energy applied to an object would be radiated
at extremely short wave lengths, approaching infinity. things
obviously didn't do this, so Planck developed the idea that
energy came in quanta, related to the constant bearing his name.
In quantum physics they kept coming up with infinities in their
calculations. These infinities, as said, led to totally
unobserved phenomena. When they developed renormalization
their calculations started working.
As far as the universe is concerned, it is not infinite and
will never become so. Current theories set the size of the
universe at about 93 billion light years (per Wikipedia).
Since it is expanding at a non-infinite speed it will never
reach infinity, assuming that it does continue expanding.
I believe there is some doubt as to whether there are an
infinite number of points in the universe. It depends on
the ultimate structure of space, which of course is an
area of intense theoretical research.
And of course questions about what spacetime is are
rather more philosophical than scientific.
Bill Gill
