Haley's Comet, now NASA knows of about 3,600 other comets than that one out there.

除了雷彗星，科学家知道的其他彗星还有3600颗。

Where will this comet be in the sky?

彗星会在天空的哪个位置？

Oh! Oh, like Halley's comet. Exactly.

! 雷彗星的雷，是的。

When Earth passes through a stream of this debris shed by a comet, the particles burn up in our atmosphere, and we see a meteor shower.

当地球穿过彗星散落的一连串碎片时产生摩擦，些微粒就在大气中燃烧起来，就是我们看到的流星雨。

It's hard to say how big the comet really was, because by the time we found it, the powerful gravity of Jupiter had already fractured the object into a couple dozen pieces.

我们很难判断颗彗星的真实尺寸，因为当发现它时，它已经在木星强大的引力作用下被撕裂成了二十多块碎片。

The Stardust would then be travelling at the same speed as Comet Wild Two.

届时星尘号将和“怀尔德2号”彗星以相同的速度移动。

Newly discovered comets are now named after the famous figures proposed by the discoverers.

新发现的彗星是以其发现者所推荐的名人的名字来命名的。

Comet Halley's water is similar to that on Earth.

雷彗星的水相似于地球。

The Eta Aquariid meteor shower is an annual phenomenon that occurs when the earth approaches a trail of dust and debris left by the famous Halley's Comet in the celestial event.

埃塔水瓶座流星雨是一年一度的天象，当地球接近著名的雷彗星在天体事件中留下的尘埃和碎片时，就会发生流星雨。

The Earth passes through that debris in April and the shooting stars that are really Thatcher's meteors burn up in our atmosphere.

地球在四月的时候穿过那些陨石碎片，也就是在我们大气层中燃烧的流星实际上是Thatcher彗星带来的。

And the surviving microbes began to grow in their new home.

彗星上幸存的微生物开始在该行星上繁衍。

Halley's Comet follows a path with an eccentricity of approximately 0.97.

雷彗星的轨道的离心率约为0.97。

Three years after Galileo launches, Comet Shoemaker-Levy 9 has been captured by Jupiter's gravity.

伽利略发射三年后，苏梅克-列维九号彗星被木星的引力捕获。

Below that, a pictograph may mark the sighting of Hailey's Comet in 1066.

其下方的象形文字则可能记录的是1066年雷彗星经过地球的景象。

Halley's Comet, now NASA knows of about 3,600 other comets than that one out there.

除了雷彗星，美国航空航天局对大约3600颗其他类型的彗星也有所了解。

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。

So this is the activity of the comet.

所以就是颗彗星的活动。

The rare comet was discovered last September.

去年9月人们发现了个罕见的彗星。

Here's why this is happening. There's a comet named Thatcher.

下面来解释一下发生天琴座流星雨的原因。有一颗名为“佘契尔”的彗星。

Comets that pass extremely close to the sun are called sungrazing comets.

运动时极其接近太阳的彗星被称为掠日彗星。