|MadSci Network: Astronomy|
In a tv show I was watching earlier, an astronomer said that by calculating the age of the universe (about 13.5 years old), and by taking into account the expansion, the universe is about 40 billion light years across. But there is supposedly an unknown portion of the universe that we can't observe today. So is the "40 billion light years across" somehow already taking into account that fact, or is he just stating the diameter of the observable portion? Also, is the size of the UNobservable universe a relevant issue in calculating the age of the universe?
Re: How important is the UNobservable portion of the universe?
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