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Subject
- stellar associations[remove]449
- photometry226
- infrared photometry121
- optical astronomy115
- galaxies74
- magellanic clouds67
- wide-band photometry61
- pre-main sequence stars57
- proper motions53
- radial velocity49
- open star clusters48
- young stellar objects33
- stellar spectral types29
- stellar distance27
- hst photometry25
- chemical abundances24
- line intensities24
- milky way galaxy24
- spectroscopy24
- x-ray sources24
