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Subject
- milky way galaxy[remove]623
- photometry174
- galaxy planes152
- chemical abundances135
- surveys111
- radial velocity110
- optical astronomy97
- infrared photometry96
- radio astronomy88
- interstellar medium69
- open star clusters67
- proper motions63
- stellar distance62
- spectroscopy57
- variable stars50
- infrared astronomy48
- giant stars47
- molecular clouds46
- infrared sources38
- metallicity38
