A team of astronomers has identified the oldest quasar ever observed, a supermassive black hole-powered beacon from the early universe. The discovery was made using the European Space Agency's Euclid space telescope, revealing an object that shines with the luminosity of a trillion suns.
The newly found quasar is not alone; Euclid has uncovered a treasure trove of similar black hole-powered quasars from the same cosmic epoch. These objects offer a direct window into the formation and growth of supermassive black holes when the universe was less than a billion years old.
Euclid, launched in July 2023, is primarily designed to map the dark universe, but its wide-field survey capabilities have proven invaluable for spotting rare, high-redshift quasars. The telescope's sensitivity in the infrared and visible wavelengths allows it to detect these distant, extremely luminous objects that dominated the early cosmos.
This discovery pushes the frontier of quasar astronomy, providing key data for models of black hole seed formation and early galaxy evolution. The finding aligns with expectations that quasars were more common in the early universe, acting as cosmic lighthouses illuminating the epoch of reionization.
While the quasar's precise redshift and host galaxy properties require follow-up observations, the discovery validates Euclid's dual role as a dark energy probe and an explorer of the universe's infancy. Scientists caution that confirming the exact age and mass demands spectroscopic analysis, which could refine or challenge current theoretical limits.