• Question: How many galaxy are there

    Asked by anon-219749 to Ali, Bella, Declan, Emma, Laurence, Nicolas on 7 Jun 2019. This question was also asked by anon-219105.
    • Photo: Laurence Datrier

      Laurence Datrier answered on 7 Jun 2019:

      We believe there are roughly 2 trillion galaxies in the observable universe. Until recently, we had that estimate at 200 billion – observations by the Hubble Space Telescope revealed that there were 10 times more galaxies than we thought! We’d missed a lot of them before because they were too small and faint.

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