interstellar gas

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。

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。

As the supernova blast wave slams into tenuous clouds of interstellar gas, the resulting collision heats and compresses the gas, causing it to glow.

当高速行进的超新星冲击波与稀薄的星际气体相撞时，气体受到压缩和加热，因此而发光。