• Question: What is dark matter

    Asked by loch2591 to Stephen on 17 Nov 2017.
    • Photo: Stephen Rhatigan

      Stephen Rhatigan answered on 17 Nov 2017:


      Dark matter makes up most of the mass in the Universe (more than 90% I think). We know this because we can observe the gravitational impact of dark matter. However, we can’t observe it directly as it doesn’t interact with light in the way ordinary matter does. So it is quite mysterious.

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