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Subject
- photometry8,445
- optical astronomy4,801
- galaxies4,327
- infrared photometry3,725
- spectroscopy3,185
- surveys2,417
- radial velocity2,268
- wide-band photometry2,089
- radio astronomy1,941
- chemical abundances1,804
- variable stars1,694
- redshifted1,669
- multiple stars1,461
- x-ray sources1,429
- open star clusters1,409
- infrared astronomy1,317
- infrared sources1,252
- galaxy clusters1,212
- quasars1,093
- radio sources1,087
