• Question: how many stars are there

    Asked by anon-186548 to Verity, Trystan, Raquel, Danny, Catherine, Andy on 13 Nov 2018. This question was also asked by anon-186542.
    • Photo: Verity Hill

      Verity Hill answered on 13 Nov 2018:

      This is quite a difficult question to answer! This is because we can’t see all of the universe, because the light from a lot of stars hasn’t reached us yet (and may never reach us).
      We think there’s about 10^21 stars – that’s a 1 with 21 zeroes behind it, which is more than all of the grains of sand on every beach in the world

    • Photo: Danny Ward

      Danny Ward answered on 13 Nov 2018:

      Scientists have estimated that there are 100 billion galaxies containing about 1000000000000000000000 (1 billion trillion) stars. So quite a few!! ⭐

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