The unification scheme for radio galaxies and quasars
![](https://cdn.sci.esa.int/documents/33704/35439/1567220685624-i_screenimage_27143.jpg)
If an observer views the object from such an angle that they are peering over the dust wall directly into the central powerhouse then they see a quasar.
If, on the other hand, the object is oriented such that the central emission is blocked from the observer by the dust wall, then the object is perceived as a radio galaxy.
Last Update: 1 September 2019