Results 321 to 330 of about 120,003 (344)
Some of the next articles are maybe not open access.
An ultraluminous quasar with a twelve-billion-solar-mass black hole at redshift 6.30
Nature, 2015So far, roughly 40 quasars with redshifts greater than z = 6 have been discovered. Each quasar contains a black hole with a mass of about one billion solar masses (109 ). The existence of such black holes when the Universe was less than one billion years
Xue-bing Wu +12 more
semanticscholar +1 more source