光波和无线电波能被星际气体和尘埃吸收及散射。
Light and radio waves are absorbed and scattered by interstellar gas and dust.
当宇宙微波背景辐射通过星系团时，气体将其中光线散射开来，其方式类似于地球大气层散射星光而使一些星星貌似闪烁。
These gases scatter light from the cosmic microwave background radiation as it passes through the clusters, similar to the way Earth's atmosphere can scatter starlight, making some stars twinkle.
更麻烦的是，二氧化碳和水蒸气（两种主要的温室气体）对不同波长的辐射有不同的吸收率和散射率。
Worse, carbon dioxide and water vapor (the two main greenhouse gases) absorb and scatter differently at different wavelengths.
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