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Subject
- morgan-keenan classification[remove]121
- photometry44
- optical astronomy29
- wide-band photometry23
- infrared photometry18
- magellanic clouds16
- radial velocity14
- open star clusters12
- stellar spectral types12
- late-type stars11
- variable stars10
- spectroscopy9
- early-type stars8
- o stars7
- supergiant stars7
- apparent magnitude6
- b stars6
- multiple stars6
- medium band photometry5
- milky way galaxy5
