Subject
- bl lacertae objects23
- spectral energy distribution23
- carbon stars22
- observational astronomy21
- very long baseline interferometry21
- two-color diagrams20
- magnetic fields19
- gamma-ray astronomy18
- stellar distance18
- ultraviolet sources18
- star forming regions17
- nebulae16
- stellar ages16
- star atlases15
- supernova remnants15
- intergalactic medium14
- stellar spectral types14
- late-type stars13
- spectrophotometry13
- effective temperature12