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physical object > natural object > celestial body > collection of stars > galaxy > infrared galaxy > IRAS galaxy

IRAS galaxy comparison table

Subject	has definition	emit	is a kind of
infrared galaxy			galaxy
IRAS galaxy	Any galaxy which was discovered by the Infra-Red Astronomical Satellite (IRAS) to possess an excessive amount of infrared emission.	excessive amounts of infrared light	infrared galaxy

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