In Orion, there's a reflection nebula called M 78.

在猎户座中，有一个被称为 M 78 的反射星云。

We saw this in the last episode; the dust surrounding the Pleiades star cluster is a reflection nebula.

我们在上一期看到过；昴宿星团周围的尘埃是一个反射星云。

While EMISSION nebulae glow due to their own light, REFLECTION nebulae are bright because — can you guess? — they reflect the light of nearby bright massive stars.

发射星云由于自身的光线而发光，而反射星云之所以明亮，是因为——你能猜到吗？——它们反射了附近明亮的大质量恒星的光。

Between M78 and Earth are long filaments of very cold and dark dust, blocking the light from the reflection nebula behind and looking like dark rivers running through it.

在 M78 和地球之间是由非常寒冷和黑暗的尘埃组成的长丝状物，阻挡了来自后面反射星云的光线，看起来就像流经其中的黑暗河流。