• Question: why is mars red?

    Asked by to Edward, Ian, Mathew, Naomi, sakshisharda on 20 Jun 2014. This question was also asked by .
    • Photo: Naomi Osborne

      Naomi Osborne answered on 20 Jun 2014:

      It’s because Mars’ surface contains a lot of iron oxide – which is what makes rust look red. When iron reacts with oxygen it absorbs blue and green wavelengths of visible light, reflecting red wavelengths, which is why it looks this colour 🙂

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