Those are the meteors, not to be confused with meteoroids or meteorites.

那些就是流星，不要和流星体或陨石搞混。

There is also a class of object called meteoroids.

还有一样东西称为“meteoroids（流星体）”。

All Earth-crushing comets and asteroids start out as meteoroids.

所有碾碎地球的彗星和小行星刚开始都是流星体。

But the small, rocky bodies that cause the lights — those are meteoroids.

但产生光的小型岩石天体——那些是流星体。

The vast majority of meteoroids are small and tend to burn up in our atmosphere.

绝大多数的流星体都很小，而且容易在大气层中燃烧。

There are a lot of small rocks that are zinging through space. They're called meteoroids.

有许多小岩石在太空中穿梭。它们被称为流星体。

But sometimes meteoroids travel in packs.

但有时流星体会成群飞行。

Meteoroids become meteors when they enter our atmosphere and meteorites when they hit the ground.

流星进入地球大气层时会变成流星，撞击地面时变成陨石。

" Chondrite" is just the name given to the class of stony meteoroids that most commonly strike the Earth.

这种陨石常常袭击地球， 但是只有碳质球粒陨石带有水你从它的名称中也可以得知它们带有很多的碳， 它们之所以带有水。

Now, most meteoroids burn up entirely as meteors.

现在，流星体的大部分完全燃烧成流星。

So where do meteoroids like this come from?

那么像这样的流星体是从哪里来的呢？

And when it's deorbited, it basically acts in the same way that a meteoroid does.

当它们脱离轨道时，行为基本上与流星相同。

In February 1969, that meteoroid hit Earth's atmosphere.

1969 年 2 月，这颗流星体撞击了地球大气层。

The air radiates away this heat, in turn heating up the meteoroid.

空气将热量辐射出去，又反过来加热流星体。

But again, most of these meteoroids are teeny tiny.

但是同样的，大部分的流星都很小。

A meteoroid is just a fancy science word for a small object floating around in space.

流星体是一个高大上的科学术语，指漂浮在太空中的小物体。

Meteoroids fall at a minimum speed of 25,000 miles per hour.

流星体以每小时 25000 英里的最低速度坠落。

This particular meteoroid didn't just burn.

这颗特殊的流星体不只是燃烧。

Very rarely, an incoming meteoroid will survive all the way to the ground and become a meteorite.

非常罕见的是，来袭的流星体会一路飞向地面而未被燃蚀，落到地面并变成陨石。

Meteoroids turn into meteors once they enter the Earth's atmosphere and start heading for a fall.

流星体一旦进入地球大气层，就会变成流星，并开始坠落。