Q&A: Galaxies, Galaxy Clusters, AGN, and Quasars
In the past has there been a news
item that addressed the speed of distant quasars in relation to closer
objects nearer to Earth?
More information on 3C273 may be found at the Field Guide to X-ray
Sources: Quasar 3C273:
A more general field guide on quasars and active galaxies may also