• Question: how is big is space

    Asked by #the-mad-scientist to Christie, Dan, David, Dawn, Sian on 15 Jun 2016.
    • Photo: Dawn Lau

      Dawn Lau answered on 15 Jun 2016:

      The rough estimate of the diameter of the observable universe is approximately 93 billion light years. The universe is expanding all the time, and there is more universe out there than what we can see – so it’s impossible to get an accurate answer.

      Here is an interactive tool to let you visualise the scale of the universe (it’s mind-boggling!): http://www.bbc.com/future/bespoke/20140304-how-big-is-space-interactive/

    • Photo: Sian Thomas

      Sian Thomas answered on 15 Jun 2016:

      Round of applause for Dawn 🙂

    • Photo: Christie Waddington

      Christie Waddington answered on 20 Jun 2016:

      It’s impossible to say how big space it is! We cannot measure it, but Physicists think they can estimate it using the laws of the universe that we know (Dawn’s answer covers that one!).

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