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- spectroscopy22
- stars22
- galaxies11
- redshift-surveys7
- surveys7
- optical spectroscopy6
- dk1545
- light curves5
- stars, galaxies4
- active-galactic-nuclei3
- blazars3
- ob-stars3
- spectroscopic observations3
- time-domain-astronomy3
- gamma-ray-sources2
- high-energy-astrophysics2
- milky-way-galaxy2
- astrometry1
- astronomical-simulations1
- broad-band-photometry1