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

那些就流星，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）”。

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。被称为流星体。

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

流星进入地大气层时会变成流星，撞击地面时变成陨石。

The phenomenon of the meteoroid getting hot and blazing across the sky is called a meteor.

流星体在天空中变热并烧的现象称为流星。

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，速度可能每秒几十公里。

" 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， 只有碳质粒陨石带有水你从的名称中也可以得知带有很多的碳， 之所以带有水。

Of course, on occasion the meteoroid coming in can be a tad bigger.

当然，有时来飞的流星体可能会大一点。

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

非常罕见的，来袭的流星体会一路飞向地面而未被蚀，落到地面并变成陨石。

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烧。

The meteoroid belt. - Don't we have a tractor beam?

流星带 -我不有牵引光束吗？

But sometimes meteoroids travel in packs.

有时流星体会成群飞行。

But again, most of these meteoroids are teeny tiny.

同样的，大部分的流星都很小。

Amazingly, a typical meteor that you'll see is due to a meteoroid that's tiny, probably smaller than a grain of sand!

令人惊讶的，你将可能看到的一颗典型的流星由一个非常小的流星体形成的，可能比一粒沙子还小！

In this case, the actual bit of solid stuff coming from space is called a meteoroid.

所以，来自太空的固体物质被称为流星体。

And a meteoroid coming in at hypersonic speeds compresses the air in front of it a lot, heating it hugely.

一个流星体以高超音速飞来，会对前面的空气进行很大的压缩，使其大幅升温。

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。

If one or a piece of a smaller one called a meteoroid hits the surface of the atmosphere it turns into a meteor.

若其中的一块固体或者比陨石更小的我称之为流星体的物质从大气层表面划过，此时就成为了流星。

Just like meteoroids are relatively small rocks that are zipping around in space, asteroids are bigger ones and two of those have been in the news recently.

就像流星体在太空中快速移动的相对较小的岩石一样，小行星较大的岩石，其中两颗最近出现在了新闻里。

Sometimes, the immense pressure of ramming Earth's air causes the incoming meteoroid to crumble or even explode, raining down dozens or hundreds of smaller pieces.

有时，撞击地大气的巨大压力会导致来袭的流星体破碎甚至爆炸，将数十或数百个更小的碎片抛洒下来。