Subject
- galaxy planes147
- carbon stars131
- magnetic fields130
- seyfert galaxies127
- h alpha photometry126
- medium band photometry126
- optical observation124
- pulsars118
- morgan-keenan classification111
- star forming regions111
- extragalactic survey100
- supergiant stars97
- x-ray binary stars97
- ob stars96
- absolute magnitude94
- nebulae91
- emission line stars89
- interstellar reddening88
- g stars85
- spectrophotometry85