Well the earth is rotating while simultaneously revolving around the sun.

其实在的同时也绕太阳公。

Its rotational axis is flipped upside-down, which means that the planet spins backwards.

它的旋轴是颠倒的，这意味着行会反向。

Though it spins quickly, Jupiter's orbit around the sun takes about 12 years.

尽管木速度很快，但它绕太阳公大约需要12年。

What is the fastest spinning planet in our solar system?

太阳系中最快的行是哪颗？

We can see it more often than that because of how fast the Earth rotates.

我们经常能看到月亮，是因为速度快。

When a planet is that close to its star, its rotation becomes locked.

当颗行离它所环绕的恒近时，它的就会固定。

So it spins backwards compared to the direction of spin of all the other planets.

因为的方向不同于太阳系中所有其他行。

One turn on the Earth's axis takes 24 hours — that's what makes one day.

，需要24小时也就是天。

Some spin with periods many seconds or even minutes long.

它们有些的期仅有几秒甚至几分钟。

When the Earth spins on its axis, ocean levels stay the same.

当时，海平面保持不变。

Is because my rotations the same speed as the Earth taught in this rhyme.

是因为我的速度和的公速度相同。

It takes 243 Earth days for Venus to complete one full rotation.

金圈需要243个日。

You see, Earth's spin on its axis gradually slows down over time.

你看，沿轴的速度随时间而逐渐减慢。

That means they orbit in the opposite direction that the planet spins in.

这意味着它们的轨道方向与行的方向相反。

Over long time scales, Earth's rotation is actually slowing down.

从长期来看，的实际上正在减慢。

Not to mention, the Earth's spin may increase, making days only hours long.

更不用说的速度也将加快，天可能只有几个小时。

The speed of this rotation is what defines a day.

的速度决定了天的长度。

At the Equator, Earth spins at a speed of 1670 kilometers per hour.

在赤道，以每小时 1670 公里的速度。

In their rotational and orbital movements, stars and their satellites go from right to left.

天体的行和它们的卫公和的运动，都是从右向左。

Telltale tweaks to the spins of dead stars called pulsars scattered throughout the Milky Way.

散布在银河系中的、被称为“脉冲”的死亡恒，其发生了微妙的变化。