EntityQ3694453· pop 6· linked from 10 articlesK correctionSign in to saveFormula for measuring astronomical objectsConnectionsastronomyEntitygalaxyEntitydigital object identifierEntityEdwin HubbleEntitywavelengthEntityparsecEntitypolynomialEntityredshiftEntityelectromagnetic spectrumEntityapparent magnitudeEntityabsolute magnitudeEntitybibcodeEntityQ118398EntitymagnitudeEntityspectral lineEntityfluxEntityphotometryEntitycolor indexEntityQ22908627EntityThe Astrophysical JournalEntityCategoriesAstrophysicsDoppler effects