Why do cosmologists assume that inflation began shortly after the Big Bang, rather than at the exact start?
How could universe inflate itself out of the very dense and curved early spacetime? Could it happen in a black hole too?
How distant were the furthest currently-observable cosmic events when their currently-observed radiation was emitted?
Have astronomers taken into account the fact that red-shifted light from far-away stars is also very old when studying the expansion of the universe?
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