This spectacular composite image shows how the coma and tail of Comet Holmes have changed.

Haley's comet was shooting across the sky.

哈雷彗星飞快地穿过天空.

Which annalistic style book in ancient China leaving the earliest record about Halley's Comet?

在中国古代哪本编年史书中留下了关于哈雷彗星最早的记载?

A newfound comet is heading towards the sun. It will likely not survive.

一颗新近被发现的彗星正一门心思地向太阳冲去, 可能小命难保.

It is a member of the Kreutz Group, as Subfragment I, split from an earlier comet.

可也可能是更早分裂的一颗彗星所组成的克鲁兹族彗星的一员.

What happened the games began, a comet appeared in the sky.

在比赛开始后, 天空出现了一刻彗星.

In that way, Pluto acts like a comet.

也就是说, 冥王星的行为像一个彗星.

Whether a cometary outburst with a jet can cause observable short-term non gravitational effect is investigated.

探讨伴有喷流的彗星爆发是否造成可观测的非引力效应.

We just released the findings from our preliminary analysis on the cometary side.

我们刚刚发表了来自彗星尘埃初步分析的发现.

The cometary ejection play a crucial role in formation and evolution of the meteoroid stream.

彗星的喷发速度在流星群的演化过程中起着重要作用.

This cometary debris – bits of ice – create a meteor shower.

这些彗星的残骸——少量的冰——形成了流星雨.

So the cometary dust work had to take priority.

也因此彗星尘埃的工作获得了优先.

We need to study more comets.

我们需要研究更多的首星.

Comets are usually made of ice and rock.

彗星通常是由岩石和冰构成的.

Early Studies were connected with the origin of short-period comets.

早期的研究是为了探讨短周期彗星的起源.

These small objects, including asteroids, Kuiper Belt objects, comets and interstellar dust.

这些小天体包括小行星 、 柯伊伯带的天体 、 彗星和星际尘埃.

Any school kid can tell you that comets are made of ice.

随便找个小学生都会告诉你,彗星是由冰组成的.

Scientists want to learn how comets come into being.

科学家们想了解彗星是怎么形成的.

Perhaps, extinctions are caused by something outside, like comets and asteroids.

也许, 灭绝是由外来物体引起的, 比如彗星和小行星.

In addition, there are thousands of small bodies as asteroids and comets.

此外, 被发现的还有成千上万的小型天体像是小行星和彗星.

There are about 800 comets whose orbits are known.

人类已经知道有运行轨道的彗星大约有800颗.