The European Space Agency’s Euclid space telescope has pulled off one of the more striking finds of its young mission, ...

In a new paper in The Astrophysical Journal, JILA Fellow Jason Dexter, graduate student Kirk Long, and other collaborators compared two main theoretical models for emission data for a specific quasar, ...

Astronomers observed ancient quasars that appear to be surprisingly alone in the early universe. The findings challenge physicists' understanding of how such luminous objects could have formed so ...

Astronomers have identified a remarkable population of distant quasars whose radio jets balloon to scales that make our own galaxy look compact, stretching to widths roughly 50 times larger than the ...

The Euclid space telescope has spotted the oldest quasars—the brightest objects in the universe—ever discovered, deepening a cosmic mystery that has been puzzling scientists. Quasars are powered by ...

Euclid has turned up a long-sought population of ancient quasars, including the most distant one yet seen. As a result, it has started to change how astronomers study the Universe’s first giant black ...

A quasar is the extremely bright core of a galaxy that hosts an active supermassive black hole at its center. As the black hole draws in surrounding gas and dust, it blasts out an enormous amount of ...