• Question: How many years ago was the big bang and how many galaxies do you roughly estimate there is?

    Asked by anon-191589 to Kathryn, Graeme, Chris, Anne, Agnes, Adam on 13 Nov 2018.
    • Photo: Anne Green

      Anne Green answered on 13 Nov 2018:

      The Big Bang happened 14 billion years ago and there are roughly a trillion galaxies in the universe.

    • Photo: Graeme Poole

      Graeme Poole answered on 13 Nov 2018:

      The Big Bang happened 13.7 billion years ago. We now of 100 billion galaxies so far, but there could be even more out there. Maybe even a trillion.

    • Photo: Adam McGuinness

      Adam McGuinness answered on 13 Nov 2018:

      One for the space scientists to answer!

    • Photo: Kathryn

      Kathryn answered on 13 Nov 2018:

      13.7 billion years ago. but the number of galaxies I have no idea. You need Astronomer for that.

    • Photo: Agnes Wojtusiak

      Agnes Wojtusiak answered on 13 Nov 2018:

      I remember the first time I actually used some maths to calculate it at uni – it was so cool when I got the right answer! 😀

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