interstellar dust

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。

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。

The resulting image highlights the bright swept-back ridges that outline pockets of cool interstellar dust and gas.

得出的图片突出显示了星际尘埃和气体群的轮廓所形成的明亮的后掠式突起。