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Subject
- photometry8,427
- optical astronomy4,785
- galaxies4,247
- infrared photometry3,725
- spectroscopy3,122
- radial velocity2,267
- surveys2,196
- wide-band photometry2,089
- radio astronomy1,936
- chemical abundances1,804
- variable stars1,682
- redshifted1,669
- multiple stars1,461
- x-ray sources1,429
- open star clusters1,409
- infrared astronomy1,273
- infrared sources1,249
- galaxy clusters1,205
- radio sources1,085
- quasars1,074
