Name: 如果地球的軸線傾斜了90度會怎樣？ (What If Earth’s Axis Was Tilted by 90 Degrees?)
Uploaded: 2021-01-14T10:39:47.000Z
Duration: 3 min 37 s
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情態副詞

and it wouldn't be the Earth as you know it.

if the Earth's axis was tilted by 90 degrees.

Only two planets in the Solar System lie on their sides -

Now, if something took the Earth off its stand,

of developing any complex life on its surface.

is what drives the seasons here on Earth.

Before the collision that created the Moon,

the Earth's axis was slowly wobbling around

Then, our newly formed Moon stabilized it.

But if that collision happened at a different time,

things would turn out very different here on Earth.

its poles would be pointing straight towards the Sun.

One hemisphere would be shrouded in darkness

One day on Earth would last a whole year.

At the North Pole, the daytime temperatures

A day at the South Pole would be even worse.

away from climate-controlling ocean currents,

it would heat up to an almost boiling 80°C (176°F).

The poles would soak up so much heat from the Sun,

You wouldn't recognize the steaming equatorial tropics.

part of the equator would stay encased in ice all year round.

our continents would get clumped together around one of the poles.

Inland temperatures in the daytime would get truly hellish -

reaching the boiling temperature of water.

not let all the water vapor off the planet.

Green plants would be having a hard time surviving

during the six months of complete darkness.

if the Earth was 60 million km (40 million miles)

a 90-degree axial tilt wouldn't be so bad.

would never raise above 46°C (115°F) during the day.

The coldest it would get at night would be 3°C (37°F).

The only place covered with ice would be the highest mountains.

So you see, simply orbiting a star in the habitable zone

doesn't mean that a planet is actually capable of sustaining life.

We're the lucky ones living here on Earth.

Maybe one day we'll discover another exoplanet,

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如果地球的軸線傾斜了90度會怎樣？ (What If Earth’s Axis Was Tilted by 90 Degrees?)

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