Cosmology

Astrophysicist Priyamvada Natarajan predicted that black holes can form without the help of stars. New observations support her theory

Cosmic Microwave Background Stage 4, a top-priority project for U.S. astrophysics, was designed to make breakthrough observations of the universe’s very earliest moments. Now the U.S. government says it can’t currently support the project’s construction at the South Pole

Domain walls, long a divisive topic in physics, may be ideal explanations for some bizarre cosmic quirks

The telescope's studies could help end a long-standing disagreement over the rate of cosmic expansion. But scientists say more measurements are needed

In just one year of observations, a program that is creating the largest 3D map of the universe to date has sniffed out hints that dark energy may be stranger than scientists supposed

Several branches of modern physics, including quantum theory and cosmology, suggest our universe may be just one of many

A new catalog of more than 12,000 galaxy clusters is helping scientists better understand the universe’s clumpiness, dark energy and some of the smallest particles in the cosmos: neutrinos

Some of the faintest objects ever observed suggest that small galaxies were responsible for clearing the “fog” pervading the early cosmos

Huge empty areas of the universe called voids could help solve the greatest mysteries in the cosmos

Alaska’s rusting rivers, einstein tiles and the new science of asexuality

A quarter of a century after detecting dark energy, scientists are still trying to figure out what it is

Several unexplained measurements are threatening to upend scientists’ understanding of the universe’s origin and fate