Euclid telescope finds ancient quasars

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The European Space Agency's Euclid space telescope, launched in 2024, has released images showing two of the most ancient quasars known and a crop of 31 high-redshift quasars that trace the universe when it was about 670 million years old. The discovery more than doubles the previously known sample of such ancient quasars, which once took over a decade to assemble. Euclid's wide-area, sensitive surveys let astronomers find much fainter quasar light, giving many more targets to probe early galaxy formation and the expansion history encoded in redshift measurements.

Euclid identified quasars from 670 million years after the big bang.