Astronomy
Will the Universe Ever Stop Expanding?
Scientists debate what the future of the cosmos looks like and whether space will ever stop getting bigger and bigger
Cosmology696 articles archived since 1845
Cosmology
Time Flowed Five Times Slower Shortly after the Big Bang
Voracious black holes feeding on matter in the early universe display the curious spacetime phenomenon known as time dilation
Quantum Physics
The Universe Began with a Bang, Not a Bounce, New Studies Find
New research pokes holes in the idea that the cosmos expanded and then contracted before beginning again
Cosmology
Mirror-Image Supernova Yields Surprising Estimate of Cosmic Growth
A new way to gauge the universe’s expansion rate has delivered a confusing result that may conflict with previous related measurements
Astronomy
Satellite Constellations Are an Existential Threat for Astronomy
Growing swarms of spacecraft in orbit are outshining the stars, and scientists fear no one will do anything to stop it
Cosmology
How Star Collisions Forge the Universe’s Heaviest Elements
Scientists have new evidence about how cosmic cataclysms forge gold, platinum and other heavy members of the periodic table
Cosmology
Astronomers Grapple with JWST’s Discovery of Early Galaxies
Researchers are convinced the James Webb Space Telescope has glimpsed an unexpected population of galaxies in the early universe. Now they’re trying to decide what this means for our understanding of the cosmos...
Cosmology
JWST’s First Glimpses of Early Galaxies Could Break Cosmology
The James Webb Space Telescope’s first images of the distant universe shocked astronomers. Is the discovery of unimaginably distant galaxies a mirage or a revolution?
Astronomy
See the Oldest View of Our Known Universe, Just Revealed by the James Webb Space Telescope
Decades of work, $10 billion in spending and nearly 14 billion years of cosmic history have brought us to this moment: the first science from the largest and most powerful observatory ever built...
Cosmology
New Record-Breaking Simulation Sheds Light on ‘Cosmic Dawn’
THESAN—the largest, most detailed computer model of the universe’s first billion years yet made—is helping set expectations for observations from NASA’s James Webb Space Telescope...
Cosmology
Canadian Telescope Delivers Deepest-Ever Radio View of Cosmic Web
Data from the CHIME radio observatory are a milestone in the quest to discover the hidden origins of universal structure
Dark Matter
Cosmic Simulation Shows How Dark-Matter-Deficient Galaxies Confront Goliath and Survive
A research team finds seven tiny dwarf galaxies stripped of their dark matter that nonetheless persisted despite the theft.
Cosmology
Astronomers Gear Up to Grapple with the High-Tension Cosmos
A debate over conflicting measurements of key cosmological properties is set to shape the next decade of astronomy and astrophysics
Cosmology
Astronomers Spot Most Distant Galaxy Yet, 13.5 Billion Light-Years from Earth
The surprisingly bright galaxy, called HD1, may contain some of the universe’s first stars, as well as a supermassive black hole
Cosmology
Hubble Space Telescope Spots Most Distant Star Ever Seen
Called Earendel, the star is nearly 13 billion light-years from Earth
Cosmology
New Result Casts Doubt on ‘Cosmic Dawn’ Claim
Fresh data suggest instrumental errors may have mimicked a purported signal from the universe’s first stars
Cosmology
The James Webb Space Telescope Could Solve One of Cosmology’s Deepest Mysteries
The observatory’s unprecedented infrared measurements might at last bridge a growing rift between astronomers over how fast the universe is expanding
Cosmology
Astronomers Spot Two Dust Bunnies Hiding in the Early Universe
The scientists found several previously hidden galaxies that date back to 13 billion years ago—and many more might be missing from our current census of the early universe.
Cosmology
Galaxy Collisions Preview Milky Way’s Fate
New revelations about how galaxies collide show what might happen when our galaxy meets Andromeda
Cosmology
Was Our Universe Created in a Laboratory?
Developing quantum-gravity technologies may elevate us to a “class A” civilization, capable of creating a baby universe
