Subject
- galaxy clusters8
- radio spectroscopy8
- active galactic nuclei6
- chemical abundances6
- infrared photometry6
- interferometry6
- magellanic clouds6
- redshifted6
- catalogs5
- galaxy planes5
- optical astronomy5
- planetary nebulae5
- radio sources5
- seyfert galaxies5
- star forming regions5
- stellar masses5
- supernova remnants5
- astronomical models3
- late-type stars3
- nebulae3
