interstellar dust

Q. Why are interstellar dust particles hard to locate?

问: 为什么星际尘埃如此难以定位?

It may turn out that the tracks of real interstellar dust will look quite different.

它们将说明真正的星际尘埃轨迹看上去会是差别显著的。

Stardust's cometary and interstellar dust samples will help provide answers to fundamental questions about the origins of the solar system.

星团的采样的彗星和星际尘埃样本将有助于回答关于太阳系起源的一些基本问题。

As was discussed in earlier updates, we have been conducting tests to determine if it will be feasible to fold back the aluminum foils on the backside of the Interstellar Dust Collector.

如同在先前的更新中讨论的，我们一直在做星尘收集器背部铝片后折的可行性试验。

Here is how things stand right now: The Stardust Interstellar Dust Collector ( SIDC) is in a storage cabinet in the Stardust Clean Room at Johnson Space Center in Houston.

现在的情况是：星际尘埃收集器（IDC）放在休斯敦约翰逊宇航中心的星尘无尘室存储柜中。

These particles constitute the cores of the interstellar dust grains that may be coated with ice.

这些粒子构成了星际尘埃颗粒的核子,这些尘埃颗粒的外面也许覆盖一层冰.

Nestled within the capsule's science canister were two sets of samples: cometary particles on one side of the aerogel collector, and interstellar dust on the other.

安置在返回舱的科学罐里装载着两种样品：在气凝胶收集器的一面是彗星颗粒，另一面是星际尘埃。

Whereas the cometary samples are relatively easy to extract from the collector plates, that is not the case for the interstellar dust samples.

与从收集盘相对容易的提取出彗星样品不同，星际尘埃要困难得多。

In contrast, the interstellar dust collected by Stardust comes directly from local interstellar space.

与之相反, 星尘号收集的星际尘埃直接来自星际空间.

If humans could scan the entire surface of the aerogel, then detecting the interstellar dust particles would be easy.

如果人们能查看整个气凝胶的表面，鉴定星际尘埃将变得容易起来。

The surprising answer is, through interstellar dust.

令人吃惊的回答是:通过星际尘埃.

Astronomers usually assume that interstellar dust is closely confined to the galactic plane.

天文学家通常认为,恒星际星尘都是紧靠着银河平面的.

A diffuse mass of interstellar dust or gas or both, visible as luminous patches or areas of darkness depending on the way the mass absorbs or reflects incident radiation.

星云星际空间的尘埃或气体或两者共同构成的巨大天体，由其对光线的吸收和反射来决定其明亮可见或黑暗一团。

Interstellar dust is formed through several different processes that take place during the lifetime of stars.

在恒星的一生中会以几种不同的方法形成星际尘埃.

Q. How many interstellar dust particles did Stardust bring to Earth?

问: “星尘”带回了多少星际尘埃?

However, finding the incredibly tiny interstellar dust impacts in the Stardust Interstellar Dust Collector ( SIDC) will be extremely difficult.

然而，在星尘号星际尘埃收集器（IDC）寻找异常微小的星际尘埃是极为困难的。

These elements become part of the interstellar gas and dust.

这些元素成了星际气体和星际尘埃的一部分.

Q. Why are scientists interested in interstellar dust?

问: 为什么科学家会对星际尘埃感兴趣?

But during its long voyage stardustalso picked up a different type of sample& miniscule particles of interstellar dust that arrived at our solar system from distant stars, lightyears away.

然而在“星尘”漫长的航行中还收集了另一种的样品极微小的星际尘埃，那是来自遥远恒星（数光年外）的微粒。

Such hard X-rays can pass through interstellar gas or dust which otherwise blocks ultraviolet, optical and soft-X-ray light.

在一个活动星系中，黑洞周围通常包围着厚厚的尘埃和气体。这种尘埃和气体可以阻挡紫外线、可见光和低透力X射线。

The Stardust interstellar dust collector, however, posed a far more difficult challenge.

然而“星尘”的星际尘埃收集器却是一个巨大的挑战.

Such chemicals fall onto Mars all the time in interstellar dust and meteorites, as they do onto Earth. Yet none have been definitively detected.

这类物质不断以星际尘埃和陨石的形式落到火星上，就像落在地球上一样，但目前还从来没有被确凿地发现。

It is easy to recognize: it has dust ( not interstellar dust& just dust that settled on it from the air) and scratches.

很容易看出这里有尘埃（是星际尘埃&只是空气里的落在了上面）划痕。

How to search for interstellar dust tracks.

怎样能够寻找星际尘埃的轨迹。

The only way to obtain a true and unbiased sample of interstellar dust particles is to go to where they are – in space – and collect them there.

获得一个真实没有偏差的星际尘埃样本的唯一方法就是到太空去收集。

It was, in other words, a stream of interstellar dust flowing right at our doorstep, and Stardust was sent out to collect.

换句话说一股星际尘埃的洪流正从我们门前流过，星尘号被派去进行采集。

These stars pulsate at regular intervals and can be seen through the galaxy's immense clouds of interstellar dust that can make dimmer stellar bodies hard to spot.

这些恒星有规律地发生脉动，可以透过星系中巨大的星际尘埃云看到，这些尘埃云会使较暗的恒星体很难被发现。

Probing the Spatial Distribution of the Interstellar Dust Medium by High Angular Resolution X-ray Halos of Point Sources

用高角分辨的X射线点源的晕研究星际尘埃的空间分布

This could compromise our ability to distinguish between interstellar dust and interplanetary dust.

这有可能危及我们区分星际尘埃和太阳系内尘埃的能力。

A nebula an interstellar cloud of dust, hydrogen gas, helium gas and plasma.

星云是由尘埃、氢气、氦气和等离子体构成的星际云团。