Optical astronomy is most directly affected, for although interstellar gas is perfectly transparent, the dust is not.

光学天文学受到最直接的影响，因为虽然星际气体是完全透明的，但尘埃却不是。

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Light and radio waves are absorbed and scattered by interstellar gas and dust.

光波和无线电波能被星际气体和尘埃吸收及散射。

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A classic dark nebula, the Snake is a tendril of interstellar gas and dust about 650 light years away.

在经典黑暗星云中，蛇是星际气体和尘埃组成的卷须，长约650光年。

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When working, it splits light into its component colours, to reveal information about the chemical content, temperature and motion of planets, comets, stars, interstellar gas and galaxies.

BBC: Brute force helps Hubble renewal

The visible light from it was bright enough for George Djorgovski, Mark Metzger and Shri Kulkarni of the California Institute of Technology and their colleagues to analyse, and to demonstrate that it had travelled through a cloud of interstellar gas at least 10 billion light-years from the earth.

ECONOMIST: A symphony in gamma major

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