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Subject
- photometry8,447
- optical astronomy4,810
- galaxies4,338
- infrared photometry3,725
- spectroscopy3,198
- surveys2,417
- radial velocity2,268
- wide-band photometry2,089
- radio astronomy1,946
- chemical abundances1,804
- variable stars1,695
- redshifted1,669
- multiple stars1,461
- x-ray sources1,429
- open star clusters1,409
- infrared astronomy1,318
- infrared sources1,251
- galaxy clusters1,212
- quasars1,099
- radio sources1,087