• Question: how are the galaxies moving away from each other ?

    Asked by 823spcm42 to Eimear, James, Jonathan, Lána, Willi on 5 Mar 2018.
    • Photo: Lána Salmon

      Lána Salmon answered on 5 Mar 2018:

      Space is expanding! Imagine drawing two dots on a deflated balloon. The dots are pretty close together. Then blow the balloon up. The dots get further and further apart as the balloon gets bigger.

    • Photo: William O'Connor

      William O'Connor answered on 5 Mar 2018:

      Because the whole universe is expanding, and as it does, the galaxies tend to get further and further apart.

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