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Subject
- surveys[remove]18
- astrometry13
- stars10
- proper-motions8
- time-domain-astronomy4
- observational astronomy3
- optical astronomy3
- proper motions3
- trigonometric parallax3
- asteroids2
- astronomical object identification2
- photographic photometry2
- photometry2
- radial velocity2
- spectroscopy2
- standard stars2
- variable stars2
- catalogs1
- galaxies1
- multiple-stars1
