How Big is the Universe?
It has NO EDGE. And NO CENTER... or does it? The Scale of the Universe - http://htwins.net/scale2/ MinutePhysics is on Google+ - http://bit.ly/qzEwc6 And facebook - http://facebook.com/minutephy...
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The Universe. How big is it? Does it have a center? Does it have an edge? Is it gettingbigger, and if so, why?Well, we know that there are two different meanings for "universe" - first, the "observableuniverse" is everything that we've been able to see, or observe, thus far. And second,"The Universe" (or "the whole universe") means everything that exists or has existed, orwill exist.More specifically, the observable universe is the region of space visible to us fromearth. And since The Universe is only about 13.8 billion years old and light takes timeto travel through space, then regardless of what direction we look, we see light that'sbeen traveling (at most) 13.8 billion years...
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The Universe. How big is it? Does it have a center? Does it have an edge? Is it gettingbigger, and if so, why?Well, we know that there are two different meanings for "universe" - first, the "observableuniverse" is everything that we've been able to see, or observe, thus far. And second,"The Universe" (or "the whole universe") means everything that exists or has existed, orwill exist.More specifically, the observable universe is the region of space visible to us fromearth. And since The Universe is only about 13.8 billion years old and light takes timeto travel through space, then regardless of what direction we look, we see light that'sbeen traveling (at most) 13.8 billion years...
