Subject
- milky way galaxy109
- astrometry101
- variable stars99
- radio continuum emission97
- millimeter astronomy96
- submillimeter astronomy96
- proper motions93
- radial velocity93
- radio galaxies89
- redshifted / redshift80
- interstellar medium73
- chemical abundances67
- supernovae66
- apparent magnitude62
- h i line emission62
- line intensities58
- magellanic clouds57
- stellar distance55
- galaxy planes52
- ultraviolet astronomy49