Hubble nebula Comparison Table

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Hubble nebula comparison table

Subject has definition has synonym is a kind of is an instance of

cometary 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. reflection nebula

Hubble nebula A cometary nebula whose apex star is R Mon. NGC 2261 cometary nebula

Subject	has definition	has synonym	is a kind of	is an instance of
cometary 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.		reflection nebula
Hubble nebula	A cometary nebula whose apex star is R Mon.	NGC 2261		cometary nebula

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