Meteorites?

隕石？

What's the difference?

有什麼不同？

Well, let's start in space and work our way all the way down to the surface.

好吧，讓我們從太空開始，一直到地面。

A comet is a snowball.

彗星就是一個雪球。

It's a piece of ice now.

它現在是一塊冰。

The ice is mainly frozen gas, not water.

冰主要是凍氣，不是水。

But there could be dust and rocks and things inside the comet Haley's comet.

但海利的彗星裡面可能有塵埃、岩石之類的東西。

Now NASA knows of about 3600 other comets.

現在，美國宇航局知道了大約3600顆其他彗星。

Thin that one out there, closer in in the asteroid belt.

瘦了，在小行星帶更近的地方。

These air rocks, not gas, they could be Metal is well, but they are hard surfaces, and sometimes they come out of the asteroid belt, get closer to the surface of the earth, or at least our atmosphere.

這些空氣岩石，不是氣體，它們可能是金屬是好的，但它們是堅硬的表面，有時它們從小行星帶出來，更接近地球表面，或至少是我們的大氣層。

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

如果一個或一塊較小的叫流星體的東西撞到大氣層表面，就會變成流星。

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

它之所以會變亮，是因為它撞上了我們的大氣層，開始燃燒起來。

If it doesn't make its way all the way down to the surface, it turns into a shooting star.

如果它沒有一路下到地面，就會變成一顆流星。