Think of a 14-story building moving faster than a kilometer per second.

想象一下一个14层的高楼时速每秒1公里移动的情景。

The meteoroid is orbiting the Sun, probably at speeds of a few dozen kilometers per second.

这个流星体绕太阳公转，速度可能是每秒几十公里。

When it hits the planet it'll be moving at escape velocity, that same 11 kilometers per second.

当它落到地球上时的速度就是逃逸速度，同样是11公里每小时。

At 60 kilometers per second, the fragments really heated the atmosphere red hot almost to the temperatures of the sun.

彗星碎片以每秒 60 公里的速度将大气层加热得通红，几乎达到了太阳的温度。

As it approaches the Earth, our planet's gravity accelerates it an additional 11 kilometers per second — Earth's escape velocity.

当它接近地球时，地球的引力使它的速度又增加了11千米/秒——这是地球的逃逸速度。

The speed of light is fast: 300,000 kilometers per second, or about a billion kilometers per hour.

每秒30万公里，或者大约每小时10亿公里。

Try rubbing your hands together at a couple of hundred thousand kilometers per second and see how much heat you make.

试试以每秒几十万公里的速度摩擦你的双手，看看你能产生多少热量。

He writes that the object weighs about four tons and will strike the moon at a speed of 2.58 kilometers per second.

他写道，该物体重约4吨，将以每秒2。58公里的速度撞击月球。

Now a few days after leaving the Sun, traveling at a whopping 400 kilometers per second, that blast of charged particles reaches Earth.

在离开太阳几天后以每秒 400 公里的极速前进，带电粒子的冲击波到达了地球。

Tiny particles, or pieces, of the sun are blasted away from it at speeds of over 450 miles or 750 kilometers per second.

太阳微小的粒子或碎片以每秒450英里或750千米的速度离开太阳。

125,000 miles or 200,000 kilometers per hour or 34 miles or 55 kilometers per second.

每小时 125, 000 英里或 200, 000 公里或每秒 34 英里或 55 公里。

MERAV OPHER: It can be between 400 to 800 kilometers per second.

MERAV OPHER：速度可能在每秒 400 到 800 公里之间。

The plasma— mostly made of protons and electrons— accelerates rapidly, quickly reaching thousands of kilometers per second.

等离子体——主要由质子和电子组成——迅速加速，迅速达到每秒数千公里。

For the Earth, that turns out to be about 11 kilometers per second, for Jupiter, it's about 58 kilometers per second, and for the Sun it's a whopping 600 kilometers per second.

地球的速度是每秒11千米，木星大约是每秒58千米，太阳是每秒600千米。

MERAV OPHER: The speed of the wind dropped from around 380 kilometers per second to 100. LYNN: Instantly.

MERAV OPHER： 风速从每秒 380 公里左右下降到 100 公里。 林恩： 立刻。

A few days after leaving the Sun, traveling at a whopping 400 kilometers per second, that blast of charged particles reaches Earth.

离开太阳几天后，带电粒子以每秒 400 公里的惊人速度到达地球。

Here's a hypothetical: a telescope detects an asteroid between 100 and 300 meters in diameter racing through our solar system at 14 kilometers per second, 57 million kilometers from Earth.

望远镜探测到一颗直径在 100 到 300 米之间的小行星，以每秒 14 公里的速度穿过我们的太阳系，距离地球 5，700 万公里。

A team of physicists from institutions in Moscow, London and Cambridge established that sound could move through solid atomic hydrogen at a maximum velocity of close to 36 kilometers per second.

来自莫斯科研究所、伦敦研究所和剑桥大学的物理学家团队证实，声音可以以接近每秒30公里最大速度穿过固态氢原子。

Data from WHAM helped the team calculate that the gas was flowing away from the center of the bubbles at about 220 kilometers per second.

来自 WHAM 的数据帮助团队计算出气体以每秒约 220 公里的速度从气泡中心流出。

While some meteorites hit Earth at speeds of over 100 kilometers per second, these lunar fragments would only be traveling at a fraction of that, around 8 kilometers per second, so their damage could be pretty bad, but not entirely catastrophic.

虽然有些陨石以每秒一百多公里的速度撞击地球，但这些月球碎片的运动速度只有这个速度的一小部分，约为每秒八公里，所以它们的破坏力可能会非常严重，但不完全是灾难性的。