• Question: How many moons are there in the universe?

    Asked by alishan to Alex, Alison, Gavin, Helen, Miranda on 9 Jul 2012.
    • Photo: Alex Ireland

      Alex Ireland answered on 9 Jul 2012:


      Hi Alisha, we haven’t found all the planets in the universe yet so we don’t know how many moons there are. But there must be lots – we have over a hundred moons in just our galaxy, and there’s billions of galaxies in the universe so there’s probably billions of moons!

    • Photo: Alison Atkin

      Alison Atkin answered on 9 Jul 2012:


      I’m with Alex on this one, there must be millions and probably billions. Earth is quite unique in that it only has one moon – most planets we have found have lots of moons!

    • Photo: Miranda Armstrong

      Miranda Armstrong answered on 9 Jul 2012:


      @alishan I’m with Alex and Alison on this one. It’s very unlikely that we’ll get a answer to this question in our lifetimes, or even in our childrens lifetimes. Isn’t it exciting that there is still so much out there to learn in science!

    • Photo: Gavin Devereux

      Gavin Devereux answered on 9 Jul 2012:


      That’s a big question. Like the others (and even professional astronomers), I haven’t a clue. Have a look at these websites (http://www.astronomy.com/) and (http://www.bbc.co.uk/tv/features/stargazing/). They have a lot of interesting information. Did you watch the Stargazing series on the BBC with Prof. Brian Cox and Dara O’Briain?

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