Binary quasars, like other quasars, are thought to be the product of galaxy mergers. Until now, however, binary quasars have not been seen in galaxies unambiguously in the act of merging.

Figuring out whether a galaxy has one or two black holes in its center isn't as easy as cracking an egg and examining the yolk. But measuring how often these binary supermassive black holes form ...

Billions of light-years away, two galaxies are merging into one, creating a supermassive binary quasar at their center. Quasar is the term given to the central regions of extremely distant ...

Gravitational waves stretch and squeeze the fabric of space and time itself. When space/time is squeezed, pulsar pulses ...

Sometimes, one member of a binary duo can be punished for its partner's toxic behavior. Take the 30-or-so binary star systems recently detected near a galaxy cluster 62 million light-years from Earth.

An array of 350 radio telescopes in the Karoo desert of South Africa is getting closer to detecting "cosmic dawn"—the era after the Big Bang when stars first ignited and galaxies began to bloom.

Binary quasars, like other quasars, are thought to be the product of galaxy mergers. Until now, however, binary quasars have not been seen in galaxies unambiguously in the act of merging.

Sometimes, one member of a binary duo can be punished for its partner's toxic behavior. Take the 30-or-so binary star systems recently detected near a galaxy cluster 62 million light-years from Earth.

The binary quasar, labeled SDSS J1254+0846, was initially detected by the Sloan Digital Sky Survey, a large scale astronomical survey of galaxies and over 120,000 quasars.

Astronomers have found the first clear evidence of a binary quasar within a pair of actively merging galaxies. Quasars are the extremely bright centers of galaxies surrounding super-massive black h… ...