Question: How big do you think the universe is?

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  1. We have an approximate idea of how big the universe is, but only the parts we can see. This “observable” universe has a diameter of about 93 billion light years, which means that the most distant things we can see are 46.5 billion light years away.

    The universe is only 13.7 billions years old, but because the universe is expanding at an accelerating rate, we can “see” things which in principle are further away than 13.7 billion light years. Complicated!