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彗星的發光(fa guang)直接或間接來自太陽輻射。彗星的光譜特徵錶現為(xian wei)連續光譜上疊加有亮的發射譜(fa she pu)綫或譜帶，這錶明彗星的發光(fa guang)原因可以分為兩類。4. 彗星光譜的吸收綫 在彗星的...