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Comet colour


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I snapped a few images of Comet 2020 F3 Neowise back in July. The head of the comet appears to have blue/green colouration whilst its tail is a diffuse white. Is this the true colour of the comet or an aberration caused by my camera (Cannon 60D - unmodified) or the atmosphere? 

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Thank you for the replies. Ron, could the same be said for a fireball or is it simply down to the metals they contained? The back of my house overlooks the lower climes of the pennines which are in a north easterly direction from where I live. On a clear night a couple of years ago whilst looking in this direction, I was lucky enough to see a fireball which was almost grazing the skyline and again it clearly appeared blue / green. 

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