When I read that conditions were such and such 1 to .05 seconds after the big bang, is that duration somehow longer than 1/2 second is now (maybe because of the difference in density or like the twin paradox?)?
I think I read time seems to almost stop in a black hole. So I was wondering if the same was true for the big bang and if when it is said something happens from .5 seconds to 1 second after the big bang what frame of reference that is in.I'm not sure your question is well posed.
It is true that two clocks that are synchronised, moved apart, and brought together again may no longer be synchronised. But how would you bring a clock from one second after the Big Bang together with one now in order to compare them? There's no meaningful way to do that, so I'm afraid that there's no physical way to ask your question, let alone answer it.
What makes you think that?Cosmic rays decay at a different rate ( I think)
It is in the standard coordinates used in cosmology. Time in these coordinates is the same as time elapsed on the clocks of "comoving" observers, i.e., observers who see the universe as homogeneous and isotropic.when it is said something happens from .5 seconds to 1 second after the big bang what frame of reference that is in.
Pretty sure he's referring to time dilation from general relativity.Either you misunderstood what you read or it's wrong. Unless you tell us what you read where, we have no way of knowing which it is.