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physical object > natural object > celestial body > nebula > reflection nebula > cometary nebula

cometary nebula
subject			fact

cometary nebula	has definition 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.
	is a kind of reflection nebula
nebula	is a part of gas
	has catalog nebula catalog
celestial body	has spectra
physical object	has location or center of gravity
	has angular momentum
	has mass
	has velocity
	has momentum
	has temperature
	has volume
	has extent
	has material

Kinds of cometary nebula :

• Hubble nebula (4 facts) (NGC 2261) - A cometary nebula whose apex star is R Mon.