First discovered in the 1990s, dark energy has come to feel like a familiar face of the cosmos. Astronomers first imagined ...

Astronomers have long been puzzled by two strange phenomena at the heart of our galaxy. First, the gas in the central ...

A new idea about cosmic expansion has emerged that might remove the need for dark matter and dark energy altogether.

China's National Astronomical Observatories holds a press conference for a major scientific breakthrough in the study of dark ...

If dark matter is creating positrons in the CMZ, those particles will eventually slow down and eventually annihilate with ...

The CMZ spans almost 700 light years and contains some of the most dense molecular gas in the galaxy. Over the years, ...

The research team found that the statistical significance of the dynamical dark energy model has reached a 4.3σ confidence ...

Dark energy explains the observation that the universe’s expansion rate is accelerating. But its origins are unknown. It’s typically expected to have constant density across the billions of ye ...

That observation was the basis for a concept now known as dark energy. In the years since, cosmologists have been trying to get a handle on better measurements of that effect, and hoping to figure out ...

Dark energy is a hypothetical force that makes up about 70% of the Universe. It is responsible for the acceleration of cosmic expansion, a major discovery made in 1998 through the observation of ...