Dark Energy

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

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

The Dark Energy Survey has released a long-awaited analysis based on more than 1,500 supernovae. It suggests our laws of gravity just might be correct after all—or perhaps not

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

Scientists debate what the future of the cosmos looks like and whether space will ever stop getting bigger and bigger

The Euclid mission will probe dark energy and dark matter like never before, setting the stage for an international, multiobservatory push to solve some of the universe’s deepest mysteries

A potentially transformative theoretical study links a new model of quantum gravity with the universe’s bizarrely accelerating rate of expansion

A battle for the future of American stargazing is about to begin—and the stakes are sky high

Physicists have new ideas about why the energy of empty space is so much weaker than it is predicted to be