If the Universe is about 13.7 billion years old, and the diameter of the observable universe is 93 billion light years, how can it be that wide if the universe isn’t even old enough to let light travel that far that quickly?
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Imagine the universe is flat with 4 corners (like a piece of paper, but made out of material that can stretch infinitely). Now on each of those 4 corners, you have a tether point it can be pulled by. Also imagine that the speed of light is 100kph and nothing can move faster than 100kph. Now imagine that something pulls at each of those corners at 90kph. Those corners will all be moving away from each-other at 180kph, twice out imagined speed of light, but none are moving faster than the speed of light. Now imagine that bit of paper is actually a balloon and the whole surface is being pulled in opposing directions at speeds less than the speed of light, but faster than half the speed of light, and you sort of have it.
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