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Subject
- photometry8,444
- optical astronomy4,805
- galaxies4,320
- infrared photometry3,725
- spectroscopy3,159
- surveys2,369
- radial velocity2,268
- wide-band photometry2,089
- radio astronomy1,945
- chemical abundances1,804
- variable stars1,695
- redshifted1,669
- multiple stars1,461
- x-ray sources1,429
- open star clusters1,409
- infrared astronomy1,316
- infrared sources1,252
- galaxy clusters1,212
- radio sources1,087
- quasars1,086
