Just last week, the first possible direct evidence was announced for dark matter halos around early quasars.
These two 'anti-quasars' provide special laboratories for us to study some of the dimmest type of accretion even seen onto a supermassive black hole.
On the histograms of their redshift, optical luminosity and average optical X-ray spectral index, it is found that X-ray selected quasars are distributed at the low ends of plots of these parameters.
Near the quasars in time are other, normal galaxies that have likely just passed through a quasar phase, as seen in images released earlier this month.
Once SMBHs reach a critical size they can transform into quasars, which are extremely bright objects as small as a star but as luminous as an entire galaxy.
The finding, by Rennan Barkana of Tel Aviv University and Harvard astronomer Abraham Loeb, appears to be the first glimpse at the anatomy of the most distant quasars.
Nor could stellar slam dancing explain the narrow jets that emanate from the central powerhouses of many quasars.
In 1997 Webb's team at the University of New South Wales in Sydney analysed the light reaching Earth from distant quasars.
Energy is injected into space by quasars in the form of fast, nonrelativistic particles.
