Name: 地球の価値とは？ (What Is The Earth Worth?)
Uploaded: 2021-01-14T10:20:43.000Z
Duration: 13 min 17 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

様態の副詞

The only place on Earth officially named Earth.

but the Earth only has one astronomical Moon.

Or does it? From September 2006 to June 2007, Earth had an additional Moon

asteroid that usually orbits around the Sun but for 13 months

it fell into an orbit around our planet and became

another Moon of Earth. We can call it that because technically

a Moon is just a natural satellite. Something in

orbit around a planet that humans didn't put there.

There's no official minimum size requirement for Moon status.

Sputnik, space junk, the International Space Station -

not Moons, they are artificial satellites.

Astronomers believe that, most of the time,

Earth has additional Moons. These newcomers don't always stick around that

detect them and they could, less sensationally,

the vagueness of the word Moon means that, yes, technically

and Earth is booking it. I mean we're moving through space

incredibly quickly. A light year is an almost

unfathomable distance to put in the human terms

but our solar system orbits around the center of the Milky Way

Which means, that from the perspective of the center of

In other words, the Great Pyramid of Giza,

wasn't just built 4500 years ago, it was also built

almost three-and-a-half light years away.

Could we assign a price to the entire planet? To Earth itself?

Well, Greg Loughman, an astrophysicist at the University of California, Santa Cruz

devised a beautiful equation for assessing the

It considers their habitability, their ease of being studied

and, of course, how much money we've already spent

looking for them. Funny enough, you can solve

for Earth and find out that compared to what we've already spent looking for

exoplanets - and what we know about them - Earth is worth

The History Channel famously stuck to Earth and

rang up all of Earth's resources like water, lumber and granite using the

current market prices they arrived at a total

of seven quadrillion dollars. If you removed and

isolated all of the elements your body contains, and then solved them each

at market price, you could fetch about two thousand dollars.

Reddit user Shady Potato applied this map

to Earth. If we could mine the entire planet, and separate out all of it's

pure elements, and prices didn't change because of that, we could sell it all

Of course calculations like these don't include every single possible

thing earth, or any other planet has to offer,

and they also don't consider supply and demand.

If someone here on Earth, or some extraterrestrial

group of planet shoppers, had quadrillions,

sextillions of dollars, or the equivalent amount of power,

well, they would have the option to shop in a much

larger store. For crying out loud, there are more than 10,000 asteroids right here

near Earth. And just one of them - 433 Eros -

is estimated to contain a half quintillion dollars worth of platinum

So to be more realistic, instead of calculating Earth's value

on Earth, let's calculate its value on the

marketplace. If you, or some hypothetical group of

aliens, shopping for a planet could pick any planet

in the entire Milky Way galaxy, what about Earth would make it

is estimated to contain a supply of around 100

Earth analogues go, Kepler space mission data suggests there were probably

40 billion Earth size planets orbiting within habitable zones

of stars in our galaxy. And within the observable universe?

So, from a raw materials and habitability stand point, Earth

For one, it's probably the only planet like itself within at least 12 light years.

So its location might be prime real estate

for an intergalactic rest stop or imminent

domain. And secondly, statistically speaking,

life as we know it might not be unique to Earth,

but there probably isn't life elsewhere that formed exactly like it did here

with jaguars, palm trees and hairless bipeds

who made the same buildings and jokes and art and music

that we have. These might be the truest unique selling points for Earth.

Aliens wouldn't have to understand, or appreciate any of it,

if it merely amused them it might be worth purchasing as a sort of

Of course, interstellar planet shoppers wouldn't have

Earth currency to buy it with, and space cash

the technology it would take for them to get to us

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地球の価値とは？ (What Is The Earth Worth?)

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