数据滤波器设计问题。
这张拼贴图中所含的图片数据是通过窄带滤波器得到的，它只会传播氢原子发出的红光。
The mosaic includes image data taken through a narrow filter that transmits only the red light of hydrogen atoms.
窄带滤波器的数据追踪的是星云中的原子，硫原子发出红光、氢原子放出绿光，而氧原子呈现蓝光。
The narrow band data traces atoms in the nebula, with emission from sulfur atoms in red, hydrogen atoms in green, and oxygen in blue.
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