These are grains of cosmic dust, which existed prior to our solar system forming.

这些都是早于我们太阳系形成的宇宙尘埃颗粒。

We see baby stars being born in stellar nurseries surrounded by dust and gas.

我们知道原恒星诞生于充满宇宙尘埃和气体的恒星摇篮。

Cosmic dust is not quite the same as dust we know from the apartment here.

宇宙尘埃和我们在这间公寓里看到的尘埃并一样。

He points out that cosmic dust isn't exactly the kind of dust you or I might be familiar with.

他指出宇宙尘埃并是你我所熟悉的那种尘埃。

If you've ever looked up at the Milky Way, you've seen what's known as cosmic dust.

如果你曾经仰望系，你就会看到所谓的宇宙尘埃。

NASA has other samples still of very old cosmic dust.

- 美国宇航局还有其他非常古老的宇宙尘埃样本。

Every year, tens of thousands of tons of cosmic dust lands on Earth and mingles with terrestrial minerals.

每年， 数万吨宇宙尘埃降落在地球上，并与地球上的矿物混合在一起。

Cosmic dust is really just very small particles in the universe that are consisting of just a few molecules, often containing carbon or silicate.

宇宙尘埃实际上是宇宙中非常小的粒子，仅由几个微粒组成，通常含有碳或硅酸盐。

In space, dust interacts with cosmic rays -- high-energy particles that move through space at nearly the speed of light.

在太空中，尘埃与宇宙射线相互作用，宇宙射线是一种以接近光速在太空中移动的高能粒子。

Indeed, in addition to mass loss, the earth also acquires additional mass from space approximately 40,000 tonnes of cosmic dust settles on the Earth's surface throughout the year.

事实上，除了质量损失外，地球还从太空获得额外质量，年约有四万吨宇宙尘埃沉降在地球表面。

And-as in that Milky Way example-that cosmic dust absorbs the light of stars behind it, making it harder for us to see those stars with instruments like the Hubble Space Telescope.

而且，就和系的例子一样，宇宙尘埃吸收了它背后恒星的光，使我们很难用哈勃空间望远镜等仪器看到这些恒星。

This means they can detect invisible gases and reveal whole new areas of space that optical telescopes can't see - because with those, cosmic dust often gets in the way.

这意味着它们可以探测到可见的气体，并揭示光学望远镜看到的新空间区域——因为有了这些，宇宙尘埃常常会挡住视线。

While the recorder did not work as  intended, the twelve instruments on board provided data on a range of Earth measurements, including  the upper atmosphere, radiation, cosmic dust, and the Earth's magnetic fields.

虽然记录器没有按预期工作，但船上的十二台仪器提供了一系列地球测量数据，包括高层大气、辐射、宇宙尘埃和地球磁场。