A cosmic giant 5,000 times the Milky Way’s mass emerges from the early Universe
Astronomers have reconstructed detailed three-dimensional maps of two enormous protoclusters seen when the universe was only about 2.1…
Black hole ‘hair’ could reveal hidden matter after two black holes collide
A new theoretical framework suggests that “hair” around black holes, representing surrounding matter or departures from the simplest…
Astronomers confirm Einstein’s gravity by viewing light from behind a supermassive black hole
Astronomers detected delayed X-ray flashes consistent with light reflected from the far side of an accretion disk and…
JWST finds mysterious red objects pairing up in the early universe
JWST images have revealed four candidate pairs of “little red dots,” compact early-universe objects increasingly associated with rapidly…
The universe may contain a staggering 40 quintillion black holes
Astronomers estimate that about 40 quintillion stellar-mass black holes exist within the observable universe, a number written as…
Scientists narrow the search for dark matter using new galaxy simulations
Stellar streams have long been treated as relatively smooth structures whose gaps, kinks and spurs could reveal invisible…
From galaxies to knees | Particle
Connor Bottrell didn’t look through a telescope until he was an adult, which makes his current job all…
‘Cosmic Glitch’ could explain why gravity acts differently across the Universe
Einstein’s theory of gravity may behave slightly differently across distances of billions of light-years, with gravity appearing about…
Cosmic plasma was supposed to rule out dark photons. Simulations say otherwise
A major limit on dark photon dark matter may be far weaker because early-universe plasma stops absorbing energy…
Astronomers find an ultra-dense mega-Earth 23 times our planet’s mass but only 2.5 times its size
GJ 523b is 2.55 times Earth’s radius but about 23.5 times its mass, making it unusually dense for…
2-kiloparsec trail of stars could reveal how dark matter shapes galaxies
A thin ribbon of stars around the ultra-diffuse galaxy UGC 9050-Dw1 may be the first globular-cluster stellar stream…
The Milky Way glows brightly in first-of-its-kind neutrino image
IceCube has produced the first neutrino image of the Milky Way, revealing high-energy particle activity concentrated along our…