Rather, they are dark because of interstellar dust that hides the stars behind it.

相反，它们之所以是黑暗的，是因为星际尘埃将恒星隐藏在它的后面。

youdao

IS INTERSTELLAR DUST VISIBLE FROM EARTH?

在地球上可以看到星际尘埃吗？

youdao

But for other astronomers, interstellar dust is useful in its own right.

但对于其他天文学家而言，星际尘埃自身确是有用的。

youdao

This says that the exploding material (whatever it may be) races outwards and collides with interstellar dust and gas, producing radiation.

ECONOMIST: A symphony in gamma major

Stardust is an ambitious but low-cost mission to capture the first samples from a comet, as well as grains of interstellar dust, and return them to Earth.

BBC: Probe set for asteroid flyby

The spacecraft already has collected grains of interstellar dust.

BBC: Probe set for asteroid flyby