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

流星进入地球大层时会变成流星，撞击地面时变成陨石。

So it sort of skipped off the atmosphere.

所以这是飞出大层类。

The atmosphere of our planet is an indivisible whole.

地球大层是不可分割整体。

But there's also lots of soot that can get high in the atmosphere.

但是也有很多煤烟进入大层。

This creates a vaporized rock atmosphere on the planet like the Earth's water cycle.

这就在星球上形成蒸发岩石大层，就像地球上环样。

Simply put, if you find it beyond the Earth's atmosphere, it's yours.

简单地说，如果你在地球大层之外发现它，它就是你。

The vacuum surrounding it buzzes with artificial satellites, forming a sort of technosphere beyond the atmosphere.

包围大层外部空间人造卫星来去匆匆，形成个在大层外面所谓技术层。

Both sleet and freezing rain start as a snowflake high in the atmosphere.

雨夹雪和冰冻雨在大层高处开始形成雪花。

It exists in the upper levels of the atmosphere and is always there.

它存在于大层上层，并且直存在。

Burning fuel started fires everywhere and radiation was cast into the atmosphere.

燃烧燃料引发火灾，辐射被带入大层。

Its mission is to map the moon's surface and to study its atmosphere.

它任务是绘制月球表面地图并研究其大层。

Consider this, beyond low Earth orbit, the protection of the Earth`s atmosphere is gone.

试想，在近地轨道，地球大层保护已经消失。

Knowing about them now gives doctors something else to monitor when people leave our atmosphere.

现在，解这些信息，医生们就可以在人们离开大层时进行监测。

As these are carried towards Earth, most of them are deflected by Earth's magnetic field.

当它们到达地球大层时，大多数会因地球磁场而发生偏转。

In 1999, a 125 million dollar satellite sent to Mars, disappeared in the Martian atmosphere.

在 1999 年，枚发射到火星、价值 1.25 亿美金人造卫星，在火星大层消失。

It gets bright because it hits our atmosphere and begins to burn up.

它变得更亮是因为在划过大层时候它开始燃烧。

If one of these rocks hit's the earth's atmosphere, it becomes a meteor.

如果其中个流星体撞上地球大层，它就会变成流星。

Our atmosphere would flip, chemically speaking, from a heavy concentration of oxygen to CO2.

从化学角度来说，我们大层会从高浓度氧变成二氧化碳。

And those shadows are caused by the molecules in our atmosphere.

这些阴影是由大层中分子造成。

Our planet was able to hold on to its atmosphere and liquid water.

我们星球能够留住大层和液态。