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reflection nebula comparison table
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cometary nebulareflection nebula    A reflection nebula with a fan shape that bears a superficial resemblance to a comet. Classical examples of the heads of cometary nebulae are R Mon, R CrA, and RY Tau. All have A0-G0 type spectra that resemble the spectrum of a T Tauri star, and their brightness varies from year to year. 
Hind's nebula reflection nebulaNGC 1554, NGC 15551852 A reflection nebula illuminated by the star T Tauri. It is remarkable for its changes in brightness.Hind
NGC 1999 reflection nebula    

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