How to Build a Dyson Sphere - The Ultimate Megastructure

How to Build a Dyson Sphere - The Ultimate Megastructure
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    Human history is told by the energy we use. At first we had to use our muscles, then we learned to control fire.
    We industrialized the world using coal and oil and entered the Atomic Age when we learned how to split a nucleus.
    At each step, we increased our energy harvest to a scale never seen before and advanced as a species.
    Currently, we're slowly transitioning to renewables and if we're lucky, fusion energy will become viable in the future.
    As humanity progresses further, if we don't destroy ourselves or our habitat,
    we will likely gain complete control of our planet's resources.
    At that stage we'll probably begin to look outwards for new places to expand into.
    But space is hard and establishing a serious human presence in the solar system will require
    ungodly amounts of energy.
    Luckily, we know where to find it. The Sun - the ultimate source of energy.
    A furnace 100 quintillion times more powerful than our most efficient nuclear reactor.
    It shines with the energy of a trillion nuclear bombs per second.
    So, how do we get this energy? Not some of it, all of it.
    If we want to collect the most energy physically possible, we'll have to build the largest most
    ambitious structure in the universe.
    The Dyson Sphere, a megastructure that encompasses a whole star to capture its power output.
    For an intelligent species, building a Dyson Sphere is a technological leap on a par with the discovery of fire for our ancestors.
    The transition from a planetary species to an interstellar species. It would usher in an age of exploration and
    expansion on a scale we can barely imagine.
    So, what would it look like?
    Solid shell enveloping the Sun is probably not the way to go a large rigid body like that would be vulnerable to impacts
    possibly shattering it would be liable to drift and could crash straight into the Sun a
    More, viable design for a Dyson Sphere might be a Dyson swarm an enormous set of orbiting panels that collect the sun's power and
    beam it elsewhere
    such as sward would give humanity basically unlimited energy but building it won't be easy
    the Sun is very big so we need a lot of satellites if
    Each satellite is a square kilometer we'd need around 30 quadrillion to surround the Sun
    even if they're built as lightly as possible we need about 100 quintillion tons of material and
    Then we need the energy to actually put the parts together and deliver them to their positions around the Sun on
    top of all that we need to have a permanent infrastructure set up in space to start building
    let's assume for the purposes of this video that our descendants will take care of that and want to create the mega structure
    We can sort the challenges into three main categories
    materials design and energy
    To get the vast amounts of raw materials required for our Dyson swarm will have to largely disassemble a whole planet
    Of the planets available mercury is the best candidate it's the closest to the Sun and very metal-rich
    close to the Sun
    Means less moving stuff around and mercury has no atmosphere and only about a third of the surface gravity of Earth making it
    comparatively easy to launch material into space
    Next we should consider the design of our swarm simpler is better
    Conventional solar panels are far too intricate and short lives our satellites need to operate without repairs or intervention for
    astronomically long times and they need to be cheap to produce
    But they're most likely going to be enormous mirrors
    which refocus sunlight to central collecting stations like in concentrated solar power on earth
    to build and launch them efficiently they must be incredibly light made of little more than polished metal full bound to some supports and
    Last we need the energy to build and launch the swarm itself taking a part of planets and launching things into space
    requires an enormous amount of energy for example if we used all the fossil fuels and
    Uranium on earth and we?
    Were perfectly efficient we could only launch as much
    Mass as Mount Everest into space a rather meager accomplishment compared to planetary disassembly
    To get the energy needed to build a Dyson Sphere it's almost as if you're going to need the power output of a dyson sphere
    But that's. Ok there's plenty of sunlight to be had on Mercury so let's get to work
    Humans are expensive to keep alive and are very sensitive to the environment
    So, we'd want to automate as much as possible
    Ideally we'd have a small crew of controllers who oversee an army of autonomous machines doing the actual work
    There are four major pieces of technology required solar collectors miners refiners and launch equipment
    the solar collectors are going to give us the energy we need to disassemble the planet
    To start maybe we deploy something like one square kilometer of them either as mirrors or as traditional solar panels
    they'll provide the energy to run our miners which strip-mine the surface of the planet and our refiners which extract valuable elements and
    fabricate them into our swarm satellites
    to get them into space we need a creative and efficient solution
    Rockets aren't too expensive and difficult to deorbit and reuse
    Instead, we'll want to use a sort of railgun a longer
    Electromagnetic track which launches our satellites at high speeds
    Our swarm satellites will be packed tight for launch unfurling like an enormous origami once in orbit
    from this point we can take advantage of
    exponential growth using the energy of the existing parts of the swarm to build more infrastructure on Mercury and launch new panels faster and faster
    each panel provides the energy to build another those to work together to build the next to
    Four become eight eight become 16 and so on
    within just about 60 doubling times the Sun would be completely surrounded by solar panels and
    This can happen quickly if a square kilometer of solar collectors takes a month to build we could be done in a decade
    if only our infrastructure on the planet's surface can keep up with the quickly growing budget of energy
    Even collecting 1% of the sun's energy is an unbelievable change in our species energy budget
    We could create the infrastructure to being basically unlimited amounts of energy around the solar system for all sorts of projects
    colonies on other worlds terraforming planets
    constructing more mega structures or even traveling to other stars it could be the start of an interstellar
    Civilization based on physics alone this is not just possible but easy
    It's such a simple process and such a necessary step for any species to expand beyond their home planet that many astronomers
    Think there are probably Dyson spheres already out there in the Milky Way we haven't spotted any yet but they could be there
    it's far from certain that humanity will ever get to this point our attention is too often focused on short-term political gains and
    Conflicts that will not matter in the long run but if we survive the challenges we've set ourselves
    we could potentially become the first species in the universe to create a structure with the scope of a star if
    We? Do it the only limitation left will be our own
    We've just hit you with a lot of pretty wild claims and crazy concepts if
    You're like us and enjoy using the power of science to determine absurd ways to destroy stuff
    you might want to hear how you can come up with something like that yourself
    Brilliant is a problem-solving website that helps you learn stuff through fun puzzles that split up a complex problem into bite-sized chunks and
    build up to an interesting conclusion
    It helps you understand how science works by actually using it instead of just memorizing a bunch of stuff
    brilliance has tons of interesting courses and puzzles on things like quantum computing astronomy and logic and even dyson sphere's if
    you visit brilliant org slash nutshell
    Or click the link in the description you can sign up for free and learn all kinds of things as
    A bonus for cooks without viewers the first 688 people will, also get 20% off their annual membership
    with brilliance you can finish each stay a little bit smarter and
    Just maybe you can help to expand the human species into the universe one day
    We love dyson sphere's so much that we've also made a poster about them
    it will look pretty on your wall but
    Also has some information about the concept of a Dyson Sphere a great way to start a conversation
    Or you can just stare at it and dream about the future
    go get it here
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