Dark energy

Dark matter is mysterious substance that appears to make up about 27 percent of the universe's mass.

The observatory is expected to map around 100,000 galaxy clusters—the largest known gravitationally bound structures in the universe—and three million supermassive black holes.

Scientists have unveiled the design report for the Circular Electron Positron Collider.

The search is on for an elusive particle that could shine a light on the "dark sector"—the vast majority of the universe that we cannot see.

Leading physicist says the statistical chance of dark energy existing is low.

Particle accelerators speed up elementary bits of matter to probe fundamental questions in physics, however, current facilities require huge amounts of space.

The existence of multiple universes is hotly debated among scientists.

NASA's 2019 budget proposal calls for the telescope to be canceled "due to its significant cost and higher priorities within NASA."

Physicists can't explain the mysterious force.

New theory says we don't need dark matter or dark energy to explain the cosmos.

A scientist developed a model that mitigates the need for dark matter and dark energy.

Map is in line with measurements predicted by the Standard Model—currently our best explanation for the universe.

New experiments are showing the universe is even more complicated than we thought, and may not even have a single age.

The theory breaks with the popular idea that expansion is caused by dark energy and suggests energy for expansion would never run out.

Physicists say negative mass experiments will help solve mysteries of the cosmos.