Astronomy View all facts Glossary Help| Astronomy View all facts Glossary Help |
| physical object > natural object > celestial body > collection of stars > galaxy > active galaxy > blazar |
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| blazar comparison table | |||
| Subject | has acronym | has synonym | has definition |
|---|---|---|---|
| BL Lacertae | BL Lac | A member of a class of astronomical objects with the following characteristics: (1) rapid variations in intensity at radio, infrared, and optical wavelengths; (2) energy distributions such that most of the energy is emitted at infrared wavelengths; (3) absence of discrete features in low-dispersion spectra; and (4) strong and rapidly varying polarization at visual and radio wavelengths. | |
| Optically Violent Variable galaxy | OVV |