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Subject
- galaxies[remove]29
- theoretical-models12
- galaxy-formation11
- galaxy-masses11
- galaxy-photometry11
- infrared-photometry11
- spectroscopy11
- h-alpha-photometry10
- h-beta-photometry10
- interstellar-line-emission10
- absolute-magnitude9
- galaxy-ages8
- redshift-surveys8
- stars5
- photometry4
- quasars4
- variability4
- x-ray4
- x-ray astronomy4
- galaxy-luminosities3