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Subject
- asteroids2
- astrometric data1
- astrometry14
- astronomical object identification3
- catalogs1
- galaxies1
- measurement-error-model1
- milky-way-galaxy1
- multiple-stars1
- observational astronomy3
- optical astronomy4
- photographic photometry3
- photometry3
- proper motions4
- proper-motions8
- radial velocity2
- sky-surveys1
- spectroscopy2
- standard stars2
- stars10
