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physical object > natural object > celestial body > nebula > H II region > gaseous nebula > expanding emission nebula > planetary nebula > Silkworm nebula

Silkworm nebula (IRAS 17441-2411)
subject			fact

Silkworm nebula	has synonym IRAS 17441-2411
	has image
	is an instance of planetary nebula
planetary nebula	has expansion velocity typically 10 km/s
	has catalog planetary nebula catalog
expanding emission nebula	has composition enhanced with heavy elements relative to the interstellar medium
	has explosion date
	has progenitor star
nebula	is a part of gas
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

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