How much would it cost to buy the Sun? - Cella Wright

15,482 views ・ 2025-04-22

TED-Ed


Please double-click on the English subtitles below to play the video.

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Daedalus, ancient Greece’s genius inventor,
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hasn’t been the same since losing his child, Icarus, to the Sun.
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But suddenly, he’s suspiciously reinvigorated
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and has expressed interest in buying the Sun from Helios,
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the Sun God himself.
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Some rumors hold that Daedalus is aspiring to destroy it to avenge Icarus—
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or channel its immense power towards other imprudent aims.
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Whatever the reason, this is a job for the divine accountant;
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top-ranked financial analyst to the world’s movers and shakers,
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its literal titans of industry.
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When it comes to boiling complex systems of intrinsic value
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down to monetary sums, he’s your guy.
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Once gathered, Daedalus remarks that Helios might as well relinquish the Sun,
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since it’s bound to die anyways, which is chilling news to Helios.
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But the divine accountant interrupts.
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“The Sun provides Earth with all its energy aside from geothermal and nuclear.
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As of 2023, the global solar market was worth between $100 and 300 billion.
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Wind energy, which comes from the Sun unevenly heating the atmosphere,
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was valued somewhere between $85 and 150 billion.
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And hydropower, generated by the Sun moving the world’s water,
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was worth around $230 billion.
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Sunshine also grows all kinds of food, and in 2022,
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the global agriculture market reached approximately $5 trillion.”
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The divine accountant knows Daedalus can’t afford the Sun
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and that this is more of a cry for help than anything.
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Helios, meanwhile, is still freshly horrified.
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But the divine accountant’s not done enlightening the pair.
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“As with any natural phenomenon,
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many of the Sun’s assets are tougher to quantify.
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Of the 100 billion stars in the Milky Way, the Sun is unremarkably medium sized.
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But to earthlings, it’s everything.
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Earth likely formed from the Sun’s leftover materials,
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at just the right distance for water to remain liquid,
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so life could evolve.
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The Sun also helped generate Earth’s atmosphere,
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which traps heat by absorbing approximately 70%
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of incoming solar radiation.
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All of this has fundamentally shaped life on Earth.
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So, just in case this wasn’t clear, without the Sun,
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Earth would be untethered, frozen, and generally inhospitable.”
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“But what’s most monetarily exciting here is the future.
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After all, the Sun has another 5 billion years left.
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With the right investments,
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the Sun and Earth can maintain their delicate balance
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and their assets can be ever appreciating.
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Just looking directly at solar energy,
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the amount Earth receives from the Sun in one hour is enough to power humanity
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for a year.
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Solar panel technology only started taking off in the 1970s
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and has since grown at an unprecedented pace,
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making leaps in efficiency, affordability, and implementation.
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In the far future— who knows—
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perhaps humanity could even achieve the tantalizing theoretical physics feat
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of a so-called Dyson sphere or swarm that surrounds the Sun,
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capturing immense amounts of energy closer to the surface.”
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“Overall, the Sun is valued at orders of magnitude
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more than the earthly economy it enables,
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which is worth over $100 trillion total.
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So, no one would be able to purchase it outright.
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However, suppose Helios leased the Sun’s solar energy to Daedalus
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for whatever his project might be.
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Going off what could reasonably be harvested in the near future,
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we can look at 2050, at which point, with the right investments,
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solar energy could generate an estimated 8,519 gigawatts annually.
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Assuming a cost of 17 cents per kilowatt-hour—
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the US average— really rough approximation...
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but one year of exclusive use might reach about... $2 trillion.”
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The divine accountant is interrupted by laughter.
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Daedalus confirms he can't afford the whole ordeal,
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and thanks the divine accountant for illuminating the Sun’s immense value
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and his own humble place in the universe.
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He no longer wants to destroy anything.
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Helios, meanwhile, is just relieved that the Sun’s death isn’t imminent,
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and apologizes for the loss of Daedalus’ son.
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It dawns on them they actually have a lot more in common than they thought.
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And as is typical of finance discussions,
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they both leave feeling hopeful and revitalised.
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