For more than a decade, astronomers quietly watched the most precise clocks in the cosmos, waiting for a barely perceptible ...

A never-before-seen image of the cosmic microwave background, combining data from the Atacama Cosmology Telescope (ACT) and the Planck satellite, offers a high-definition view of the early Universe.

Somewhere in the universe, enormous black holes are circling each other so slowly that ...

Cosmic rays inside a dense molecular cloud were measured for the first time, helping scientists better understand how stars begin forming.

In a new study published in Physical Review Letters, scientists have performed the first global simulations of monster shocks ...

Astronomers have spotted a mysteriously mature “baby cluster” of galaxies in the early universe, scarcely a billion years ...

The six-year results from the Dark Energy Survey highlight unresolved tensions in standard cosmological theory.

Astronomers identified a strange object in the Milky Way that sends out powerful bursts of radio waves and X-rays with steady ...

Scientists may have just uncovered one of the deepest hidden signals in the universe — a gravitational “background hum” stretching across light-years of space. After 15 years of observation, they’ve ...

Dating to only a billion years after the big bang, JADES-ID1 may be the earliest, most distant galaxy protocluster astronomers have ever seen ...

The broadest planned survey by NASA's upcoming Nancy Grace Roman Space Telescope will reveal hundreds of millions of galaxies scattered across the ...

The way time ticks forward in our universe has long stumped physicists. Now, a new set of tools from entangled atoms to black holes promises to reveal time’s true nature ...