Firsts
| Title | Quasar | Year | Data | Notes |
|---|---|---|---|---|
| First "star" discovered later found to be a quasar | ||||
| First radio source discovered later found to be a quasar | ||||
| First quasar discovered | 3C 48 | 1960 | first radio source for which optical identification was found, that was a star-like looking object | |
| First quasar identified | 3C 273 | 1962 | first radio-"star" found to be at a high redshift with a non-stellar spectrum. | |
| First radio-quiet quasar | QSO B1246+377 (BSO 1) | 1965 | The first radio-quiet quasi-stellar objects (QSO) were called Blue Stellar Objects or BSO, because they appeared like stars and were blue in color. They also had spectra and redshifts like radio-loud quasi-stellar radio-sources (QSR), so became quasars. | |
| First host galaxy of a quasar discovered | 3C 48 | 1982 | ||
| First quasar found to seemingly not have a host galaxy | HE0450-2958 (Naked Quasar) | 2005 | Some disputed observations suggest a host galaxy, others do not. | |
| First quasar containing a recoiling supermassive black hole | SDSS J0927+2943 | 2008 | Two optical emission line systems separated by 2650 km/s | |
| First gravitationally lensed quasar identified | Twin Quasar | 1979 | Lensed into 2 images | The lens is a galaxy known as YGKOW G1 |
| First quasar found with a jet with apparent superluminal motion | 3C 279 | 1971 | ||
| First quasar found with the classic double radio-lobe structure | 3C 47 | 1964 | ||
| First quasar found to be a X-ray source | 3C 273 | 1967 | ||
| First "dustless" quasar found | QSO J0303-0019 and QSO J0005-0006 | 2010 |
Read more about this topic: List Of Quasars