... Observing . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... Rare triple quasar found . ... Furthermore, no evidence was seen of any ultraluminous infrared galaxies т?? galaxies with strong emission in infrared light т?? which is where quasars are commonly found. ... Only registered members of Astronomy.com are allowed to comment on this article. ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...