In the leading model of cosmology, most of the universe is invisible: a combined 95% is made of dark matter and dark energy.

A cosmological simulation study by researchers from the Shanghai Astronomical Observatory of the Chinese Academy of Sciences has systematically revealed, for the first time, how the interaction ...

A new study casts doubt on the universe’s accelerating expansion, suggesting dark energy might be weakening over time.

NEW YORK (AP) — Distant, ancient galaxies are giving scientists more hints that a mysterious force called dark energy may not be what they thought. Astronomers know that the universe is being pushed ...

WASHINGTON (Reuters) - New data involving millions of galaxies and luminous galactic cores is providing fresh evidence that the enigmatic and invisible cosmic force called dark energy - responsible ...

The cosmos might be playing a different game than we thought. Scientists have spent decades believing our universe was ...

NASA has completed assembly of the Nancy Grace Roman Space Telescope, moving the mission into critical testing before its ...

The mysterious force called Dark Energy, which helps the Universe to expand, might be changing in a way that challenges our ...

Physics is good at explaining many of our universe’s strange phenomena — from the way invisible beams of the light fan into rainbows to how rocket fuel can propel us into space. Even so, there are ...

In deciphering the cosmic puzzle of what the nature of dark energy is, we're going to better learn the fate of the Universe. Whether dark energy changes in strength or sign is key to knowing whether ...