Subject
- redshifted6
- surveys6
- two-color diagrams6
- active galactic nuclei5
- seyfert galaxies5
- spectroscopic binary stars5
- stellar atmospheres5
- a stars4
- globular star clusters4
- line intensities4
- peculiar variable stars4
- ap stars3
- catalogs3
- h alpha photometry3
- h ii regions3
- interstellar medium3
- metallicity3
- stellar spectral types3
- astronomical object identification2
- b stars2
