Subject
- absolute magnitude11
- surface photometry9
- co line emission8
- stellar masses8
- galaxy rotation6
- metallicity6
- extinction5
- interstellar medium5
- kron-cousins photometry5
- optical observation4
- planetary nebulae4
- supernovae4
- gamma-ray astronomy3
- photographic photometry3
- polarimetry3
- radio spectroscopy3
- stellar associations3
- stellar spectral types3
- two-color diagrams3
- accretion2
