Astronomers have uncovered a pair of giant planets that are lighter than cotton candy—super-puffs the size of Jupiter.

Astronomers have spotted many "red and dead" galaxies in the early universe. These are massive systems that stopped forming stars surprisingly early in cosmic …

Planets beyond our solar system can have magnetic fields similar to those closer to home, astronomers said Tuesday after observing extreme winds on scorching w…

Astronomers have released the largest gravitational wave catalog ever, revealing 161 new black hole collisions and pushing the total number of detections to 39…

A new result using NASA’s Chandra X-ray Observatory shows that the outer spiral arms in the Milky Way galaxy may reach wider than previously thought. This find…

Astronomers just began the largest cosmic time-lapse in history The Vera C. Rubin Observatory in Chile has started a 10-year survey of the changing night sky B…

This planet survived the death of its star—and kept its atmosphere Astronomers have for the first time observed an atmosphere around a giant planet orbiting a …

Astronomers have recently started looking for black holes bigger than galaxies. Brian Lacki explains how these “stupendously large black holes” might be used b…

Peering far into the distant, high-redshift universe, the James Webb telescope has discovered an abundance of small red galaxies known as the Little Red Dots. …

Astronomers have identified one of the most distant candidate galaxies known to leak ionizing radiation—the same kind of radiation thought to have transformed …

A new study debunks a recent claim that astronomers may have detected a lunar-mass primordial black hole. In a reanalysis of observations from the Dark Energy …