• Question: Is it hard to breathe without gravity?

    Asked by 🍭lovelylollipop10🍭 to Col Op, Elie, Floris, Jenn, RocketRich on 12 Mar 2016.
    • Photo: Richard Moss

      Richard Moss answered on 12 Mar 2016:

      No, breathing is the same as we use a muscle to change the shape of our lungs and pull air inside.
      However, without gravity the air does not mix, so the carbon dioxide we breath out forms a bubble around astronauts which is not good to breath back in. So we use fans to constantly move the air around, mixing it with fresh air.