The vast majority of these objects have been found by the Sloan Digital Sky Survey, which in the past eight years has discovered more than 100,000 of them.
The vast majority of these objects have been found by the Sloan Digital Sky Survey, which in the past eight years has discovered more than 100,000 of them. They contain a significant number of population-III stars, as indicated by spectral evidence of elements heavier than helium. Despite their name they admit radiation across the entire observable spectrum, and in fact are brightest in near-ultraviolet, although we receive it as near-infrared. While their physics is still not completely known, they are believed to be powered by the accretion disks of supermassive black holes. FTP, name this type of active galactic nucleus, extremely distant objects with luminosities greater than most galaxies.
The vast majority of these objects have been found by the Sloan Digital Sky Survey, which in the past eight years has discovered more than 100,000 of them.
{Quasar}