Quasars’ distance no longer in question | Science News

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50 Years Ago

Quasars’ distance no longer in question

Excerpt from the April 2, 1966, Science News

By
5:00pm, March 17, 2016
Quasar

FAR OUT  Light from a quasar (illustrated) comes from a disk swirling around a supermassive black hole billions of light-years away, though some researchers once thought they were nearby.

Doubt cast on quasars — Quasars are considered the brightest and most puzzling objects in the universe. They are also believed to be the most distant, some 10 billion light-years away. However, doubt was thrown on this picture of quasars by Dr. Halton C. Arp.... He reported that some quasars are not at the far reaches of the universe but are relatively close, astronomically speaking. — Science News, April 2, 1966 

 

Update 

Quasars are luminous disks of gas and dust swirling around supermassive black holes. Quasar light is redshifted, stretched toward the red part of the spectrum, which astronomers now attribute to the expansion of the universe. High redshifts imply that quasars are billions of light

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