• Question: why do we have oxygen on earth but not in space

    Asked by Diya to Trevor, Stephen - ESA Team, Paul N - Engineering Team on 22 Jan 2020.
    • Photo: Stephen Durrant

      Stephen Durrant answered on 22 Jan 2020:

      Because we have Gravity on Earth, it not only keeps us Humans on the Surface but also ensures that the atmosphere does not escape (well it does a little over time, but there are micro-organisms on earth that photosynthesis the CO2 into Oxygen )