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Subject
- absolute magnitude[remove]110
- apparent magnitude110
- optical astronomy53
- photometry50
- galaxies43
- redshifted32
- infrared photometry28
- spectroscopy20
- active galactic nuclei19
- surveys17
- galaxy classification systems14
- wide-band photometry14
- variable stars12
- galaxy clusters11
- trigonometric parallax10
- effective temperature8
- giant stars7
- quasars7
- asteroids6
- chemical abundances6