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  • BBC Science Focus Magazine

    THE EXPLAINER DYSON SPHERES

    Aug 17, 2022 3 minutes
    by DR ALASTAIR GUNN

    WHAT IS A DYSON SPHERE?

    A Dyson sphere is a hypothetical, large mechanical structure – a megastructure – designed to harness the energy of stellar nuclear furnaces. The basic idea is that a structure is constructed around a star which converts, stores or otherwise utilises, the star’s radiant energy. These facilities are postulated as the most likely, necessary and economical way of addressing the colossal energy needs of both future human civilisation and, possibly, advanced alien civilisations elsewhere in the cosmos.

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