将无线电，可见光图片与X射线图片相对比，发现冲击波吞没了大质量星云，所以我们仅能看见靠近地球段的边缘。
A comparison of the X-ray image with the radio and optical images suggests that the shock wave is engulfing this massive cloud, so we see only the edge nearest the Earth.
将无线电，可见光图片与X射线图片相对比，发现冲击波吞没了大质量星云，所以我们仅能看见靠近地球段的边缘。
A comparison of the X-ray image with the radio and optical images suggests that the shock wave is engulfing this massive cloud, so we see only the edge nearest the Earth.
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