Ancient quasars seen by the James Webb Space Telescope technically shouldn’t exist, but one rare type of dark matter could make sense of that. Ultra-self-interacting dark matter clumped into ...

Using the James Webb Space Telescope, astronomers have peered back 13 billion years to discover surprisingly lonely ...

The brightest such objects, known as quasars, are among the brightest astronomical objects in the whole cosmos. But that ...

Dark energy, the mysterious force thought to be driving the ever-faster expansion of the universe, appears to be changing ...

Abstract: Quasars in the Age of Time-Domain Astronomy: Black hole feeding, visible as quasars, is a critical ingredient in many fields from galaxy evolution to multi-messenger gravitational wave ...

"We would like to understand the difference between these systems, which holds the clue to understand just how many cosmic rays are produced in the jets of microquasars." ...