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luminous mass
subjectfact 
luminous masshas definition The mass contributed by luminous matter in galaxies (see missing mass). Luminous mass density, 5 × 10-32 g cm-3 for H0 = 50 km s-1 Mpc-1.has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:33:15.0
is an instance of mass2001-09-27 09:33:15.0
masshas unit mass unit2001-09-27 09:33:14.0
numberhas value2001-09-27 09:32:57.0