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Subject
- photometry8,427
- optical astronomy4,786
- galaxies4,252
- infrared photometry3,725
- spectroscopy3,123
- radial velocity2,267
- surveys2,200
- wide-band photometry2,089
- radio astronomy1,939
- chemical abundances1,804
- variable stars1,682
- redshifted1,669
- multiple stars1,461
- x-ray sources1,429
- open star clusters1,409
- infrared astronomy1,273
- infrared sources1,252
- galaxy clusters1,205
- radio sources1,087
- quasars1,075
