If time is relative, and spacetime is always expanding, how can the age of the universe be so specifically 13.787 billion years? From whose perspective?
In: Physics
That’s 13.787 billion years, according to Earth’s current reference frame. True, that reference frame didn’t exist for roughly 2/3 of that time period, but we have to start somewhere. And what better place to start than where we are right now?
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