Subject
- milky way galaxy107
- astrometry100
- millimeter astronomy97
- submillimeter astronomy97
- variable stars97
- radial velocity95
- proper motions93
- radio continuum emission93
- radio galaxies89
- redshifted / redshift80
- interstellar medium66
- chemical abundances64
- supernovae62
- apparent magnitude59
- line intensities58
- magellanic clouds57
- stellar distance56
- h i line emission55
- galaxy planes51
- stellar spectral types48