In a new study in the journal Nature Astronomy, Natarajan and colleagues from Harvard and Princeton identified a celestial object, known as UHZ1, as the highest (or oldest) known “red shift” X-ray ...

Plenty of groups have been theorizing about primordial black holes (PBHs) recently. That is in part because of their ...

With a redshift of 5.8, the quasar provides a glimpse of the universe when it was less than one billion years old, or about 6 percent of its current age.

Amongst objects bright enough to be studied in detail, this is the most distant by a large margin. The next most distant quasar is seen as it was 870 million years after the Big Bang (redshift 6.4).

The first quasar discovered to be a highly luminous object was 3C 273. In 1963 its redshift was determined to be 0.16, placing it relatively nearby by today’s standards.

This redshift occurs because an expanding universe carries the quasars away from us, thus making the light from them appear redder (hence the term), and also making the time variations appear to ...

At a redshift of 6.72 and with dust reddening at a level of, HSC J120505.09−000027.9 (J1205−0000 for short) is the most distant red quasar known to date and the only high-redshift red quasar ...

ALMA observations detect the dust continuum and [CII] emission from the quasar host galaxy, yielding an accurate redshift of 7.6423±0.0013 and suggesting that the quasar is hosted by an intensely ...

He became fixated on a galaxy/quasar pair, NGC 4319 and Markarian 205, in Draco. “Here we have a galaxy/pair connected by a light bridge that overturns the reliability of redshift as a distance ...