Thank you Chalnoth and phinds. However, the age would presumably depend on
the frame so have you any idea what the difference would be for
an observer at the limits of our visible universe and an observer nearby?
It seems to me that when they give the 13.2 billion figure they are assuming
that...
The experts say the age of the universe is known
with considerable accuracy. What frame of reference are
they using and why doesn't it violate the idea
of relativity to claim to have a preferred frame?
I don't find many of these responses helpful for an earnest 15 yo.
Firstly, I don't buy "you're only 15" as a useful remark.
If you have a great desire to do particle physics then you should
seek the best institutions for that subject - don't waste your time
with second rate schools...