Name: 如果你住在小行星上會怎樣？ (What If You Lived on an Asteroid?)
Uploaded: 2021-01-14T08:48:05.000Z
Duration: 5 min 26 s
Description: 【看影片學英語】數萬部 YouTube 影片，搭配英漢字典即點即查，輕鬆掌握單字發音與用法，長久累積看電影不必再看字幕。

Would you ever want to buy your own planet?

程度副詞

Unbeatable privacy and breathtaking views,

Well, before you go signing the mortgage,

there are a few things you'd want to consider.

To figure out what life would be like on a tiny,

they can be as small as 10 m (33 ft) wide,

so they fit the physical properties you're looking for.

But there are a lot of asteroids out there,

so how do you pick the best one to live on?

The main asteroid belt in our Solar System

orbits the sun roughly between Mars and Jupiter.

It contains three different types of asteroids:

The kind that you'd be looking for is carbonaceous,

because those asteroids are usually made up of 10 percent water,

which can be broken down into oxygen for breathing.

It's about 10 meters (33 feet) wide, just the size you were looking for.

It almost seems a little too convenient, doesn't it?

Well, that convenience wouldn't last long.

Once you'd landed on your new, tiny planet,

you'd realize that the conditions are a  lot different from what you're used to.

For starters, your feet would feel a lot heavier than your head.

That's because your tiny planet's gravitational force would be so weak,

that you would also experience the feeling of  other gravitational forces pulling you upward.

The other forces wouldn't be strong enough to pull you off the planet,

but they would result in you feeling a mild stretching sensation

as they compete with the gravity of your planet.

you'd also have to be careful how quickly you move around on this planet,

Every planet has something called an escape velocity,

which refers to the minimum speed an object must have to escape its gravitational field.

On a planet this size, the escape velocity would be 5 meters (16 feet) per second.

That means that you could technically leave the planet

by getting a running start and leaping off a ramp,

and then you'd be floating off into space.

But assuming you're not going to try that, you're going to be here for a while,

and you should probably start figuring out how to survive.

The first thing to worry about is where you're getting your food.

I hope you like veggies, because any meat is pretty much out of the question.

Not only would you have to bring some livestock

along with you through space successfully,

you'd also have to find enough room to keep them,

and you don't have much room to begin with.

you could bring something similar to what NASA uses on the International Space Station.

It's called the Vegetable Production System,

and it's a garden that's about the size of a piece of carry-on luggage

It's specifically designed to grow plants and vegetables in microgravity conditions.

No, you wouldn't have the most exciting menu on your rocky retreat,

Now before you go trying to figure out anything else,

A 2019 study published in The Astrophysical Journal states that

any planet smaller than 2.7 percent of Earth's mass would lose its atmosphere,

and any liquid water it might have, due to a lack of gravitational force.

Even 2.7 percent of Earth's mass is still double the mass of the Moon,

so your tiny planet would be without those- two major components for sustaining life.

If your planet can't hold an atmosphere, then you wouldn't be able to breathe,

and you wouldn't have protection from the harmful radiation of space.

Maybe buying yourself a tiny planet wouldn't be a great idea after all.

you're probably better off waiting for space hotels to be built,

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如果你住在小行星上會怎樣？ (What If You Lived on an Asteroid?)

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