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Subject
- hst photometry[remove]345
- photometry345
- galaxies204
- redshifted84
- globular star clusters74
- optical astronomy72
- infrared photometry62
- variable stars45
- galaxy clusters41
- spectroscopy41
- surveys35
- infrared sources33
- galaxy classification systems27
- stellar associations25
- gravitational lensing21
- wide-band photometry21
- x-ray sources20
- catalogs17
- infrared astronomy17
- open star clusters16
