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  • Previously, I've talked about how quickly the Earth is rotating, and I've talked about

  • why it's spinning.

  • But what would happen if the Earth suddenly stopped rotating?

  • Keep in mind, this is totally impossible.

  • Still, I find topics like this super interesting to think about.

  • If the Earth actually stopped rotating instantly, it would be very *very* bad for everything

  • on the surface of the planet.

  • Consider this. If you're standing on the equator, you're traveling at 465 meters/second from

  • West to East.

  • If the Earth put on the brakes, your momentum would keep you flying at the same speed until

  • *friction* slowed you down.

  • Imagine the jumbled forests, oceans, buildings and unfortunate animals after that event - it

  • would be carnage.

  • The atmosphere is also turning at 465 meters/second with us. If everything suddenly stopped, it

  • would be like a simultaneous hurricane of epic proportions on almost every part of the

  • planet.

  • The closer you get to the poles, however, the less damage it would cause.

  • If you were standing on the North Pole, you'd hardly feel it.

  • Let's imagine the Earth slowed down more gradually, taking a few days to come to a halt that didn't

  • tear the landscape into fine mist of dirt, seawater and a variety of organic material.

  • The stars would hang fixed in the sky; only the planets would move around, continuing

  • their paths around the Sun.

  • A day on Earth would now last 365 days. In other words, it would take a full year for

  • Earth to fully orbit the Sun, bringing it back to the same location in the sky. Each

  • year would include one long day, and then one long night. You can imagine how that would

  • be devastating to plants and animals.

  • We get a hint of this at the poles, where you can experience weeks of permanent night

  • and then weeks of permanent day. But imagine 6 months of night, followed by 6 months of

  • day.

  • The planet's tilt gives us our seasons. As we define the Earth's tilt as its rotation

  • in relation to the Sun. A stationary planet would effectively have no tilt at all.

  • Without that tilt, there'd be no axis, and no seasons. Although we would still have North

  • and South poles.

  • Because of its rotation, turning once every day, the Earth is actually a flattened ball,

  • or if you prefer, an oblate spheroid.

  • Without that rotation the Earth would become a perfect sphere. This sounds interesting

  • and probably harmless, but it's actually a *big* problem.

  • Because of the Earth's bulge in the middle, the oceans are held out at the equator by

  • 8 km. On perfect sphere Earth, the world's oceans would redistribute, flooding many regions

  • of the planet with an immense volume of water.

  • We'd end up with a single continent around the middle of the planet, with oceans surrounding

  • the north and south poles.

  • Let's assume that if the Earth stopped turning, the Earth's core would stop rotating within

  • it as well.

  • This natural dynamo generates the magnetic field that surrounds our planet and protects

  • life from radiation from space.

  • Whatever life still alive would be irradiated from the Sun and cosmic rays if it didn't

  • live underground.

  • So, if the Earth suddenly stopped turning, it would be very bad, even catastrophically

  • bad.

  • Fortunately, it's completely impossible for this to happen.

  • Thanks for watching.

Previously, I've talked about how quickly the Earth is rotating, and I've talked about

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如果地球停止轉動呢? (What If The Earth Stopped Turning?)

  • 117 9
    Cheng-Hong Liu 發佈於 2021 年 01 月 14 日
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