Why a Dyson Sphere?

My question is basically, why have a Dyson Sphere around the Sun and generate power through those means when you could just launch a bunch of magnetic satallites into a big Magnetite Sphere and use Earth s gravity as one big generator wheel?

It d use a lot less resources, there s more than just Earth in the Solar System (so more than one generator), and it wouldn t block the sun so why is a Dyson Sphere always proposed to be the next step in our evolution of exploration when this said method is far more affective? (in theory :p)

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  • 7 months ago

    It's only a thought experiment.

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  • Zirp
    Lv 7
    7 months ago

    " launch a bunch of magnetic satallites into a big Magnetite Sphere and use Earth s gravity as one big generator wheel"

    What the bleep are you even talking about?

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  • 7 months ago

    Basically the Earth's Magnetosphere is not as strong as you think

    Although it does deflect the most Dangerous Radiation from the Sun

    On Earth's surface there is no more Magnetism than a Fridge Magnet

    Barely enough to deflect a Compass Needle

    A Dyson Sphere could come into play around a fading Star

    Say a White, Red or Brown Dwarf

    Which still have Trillions of years of heat to give out

    A highly advanced Civilisation would find the Logistics easy enough

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  • In the 1960s it seemed like a good idea. Keep in mind this predates the Drake Equaiton and all its subsequent shortcomings, and also Robin Hansen's concept of a Great Filter.

    Maybe a dying civilization and a dying star can somehow use their alien technology to survive. It's waste of time, inefficient, and lame, but constructing such a system would make such a civilization a Type II Kardashev civilization.

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  • 7 months ago

    Well, using Earth's magnetic field to generate electricity is going to perform *work* on the Earth - slowing it's orbit.

    We'll start to spiral into the sun, getting increasingly hot until the oceans begin to boil away, just before we smash into Venus, killing the planet and spreading debris all around the Sun, making any hope of escaping from the carnage impossible.

    I just have to vote "no" on this one...

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  • 7 months ago

    Or better still, keep a cap on our population and learn to consume less energy. That way we have no need for megalomaniac power generation schemes at all.

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  • 7 months ago

    There probably isn't enough material in the solar system (not counting the Sun itself) to make a Dyson sphere. So there isn't really any comparison with your idea because a Dyson sphere isn't realistic.

    If one made a Dyson sphere the radius of the Earth's orbit and 1 km thick would 261,024 times the material found in the whole Earth. Even if Jupiter was made of solid material rather than hydrogen gas it would take 197 times the material which could fit in a volume the size of Jupiter.

    A Dyson sphere only 1 km thick would be nowhere near thick enough to be stable.Building a stable Dyson sphere would require getting vast amounts of material transported across interstellar distances.

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  • Amy
    Lv 7
    7 months ago

    Energy doesn't come from nowhere. Any plan for generating energy from the Earth has to take that energy away from something else.

    A Dyson sphere harvests solar energy that would otherwise be wasted (emitted into space).

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  • 7 months ago

    Good idea but a big drawback. Extracting energy from Earth will degrade it in several ways:

    1--the magnetic field strength will decline as the churning inner iron sphere at center of Earth slows down. This will expose the surface of Earth to hard radiation from cosmic rays and solar wind particles.

    2--as the inner core slows, the flow of the mantle will stop the surface crust being refreshed with new material through tectonic plate shift, subduction, and extrusion of new crust material. That will limit development of civilization on Earth. It will run out of metallic resources.

    3--The decline of the magnetic field will limit the efficiency of the orbiting induction satellites. Their usefulness will fall off and the whole idea will not be profitable.

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  • Anonymous
    7 months ago

    When the suggestion of a Dyson Sphere was made as an explanation for Tabby's Star, it drew attention to this concept. The same issue arose... a solid sphere would be unstable. So the Dyson Sphere concept was altered to a "Dyson Swarm," a mass of satellites surrounding a star rather than a solid sphere. Of course, even these would be unstable if they were in huge quantities. It is only a Sci-Fi concept and nothing more, though it is intriguing. Large satellites could be used to harness the energy of a star but nothing on the scale of a Dyson Swarm.

    The magnetism idea will not work- magnetism simply does not have enough power especially at these distances.

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    • Lv 5
      7 months agoReport

      Yes indeed. I work in Princeton and have seen a few people like Dyson, Lyman Spitzer, etc. since the early 80s.

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