• Question: what is the universe made us

    Asked by 643urak27 to Duncan on 6 Nov 2017.
    • Photo: Duncan McNicholl

      Duncan McNicholl answered on 6 Nov 2017:


      I don’t think I know what you meant to ask by this, so I’m just going to ramble on a bit about how cool the universe is. You know it’s nearly fourteen billion years old? And because light travels at a fixed speed, we can only see things if they’re closer than the distance light travels in fourteen billion years. Now don’t get me wrong, that’s a really long way, and it’s pretty difficult to see things that are that far away, but it fascinates me that there’s no reason to think that there aren’t things further away than that, even. Which means that we can’t see them because the light that left them at the very very beginning of the universe hasn’t had time to get to us yet. That’s how far away they are. And it means that maybe my great-great-great-great-great-great-great-great-great-great-great-great-grandchildren will be able to see them, because by the time they’re born, the light will have had time to get here. It’s as if the universe just keeps on getting bigger. And even more crazy than that is that because of the big bang, the universe really does just keep on getting bigger.

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