Most explanations rely on "dark energy" to explain the Universe's accelerating expansion rate, but a new study takes a different path.

For over a decade, a dim but persistent glow near the center of the Milky Way has confused astronomers. This mysterious ...

The story begins with the black hole information paradox. According to relativity, anything that falls into a black hole is ...

UChicago-led study analyzes massive galaxy clusters mapped by the Dark Energy Survey, offers new way to probe cosmic laws ...

The Universe still holds many mysteries, and among the most intriguing are these invisible components known as dark matter ...

For a quarter century, cosmology has leaned on one framework to explain how the universe expands. Known as the ΛCDM model, it assumes about 70 percent of the cosmos is filled with an unseen force ...

What is dark energy? Why does dark energy seem to be weakening? Is our universe part of a larger multiverse? What lies beyond the boundary of a black hole? The universe seems to be rotating, and if ...

Dark energy—the term used to describe whatever is causing the universe to expand at an increasing rate—is one of the universe’s greatest mysteries. The most widely accepted theory currently suggests ...

For decades, astronomers have believed that dark matter and dark energy make up most of the universe, however, a new study ...

According to the model, dark matter may have started as particles that were hot, light, massless, and fast. As the universe ...

Dark energy—the term used to describe whatever is causing the universe to expand at an increasing rate—is one of the universe's greatest mysteries. The most widely accepted theory currently suggests ...

The universe may not only be geometry and energy—but also memory. And in that memory, every moment of cosmic history may still be written. For more than a century, physics has been built on two great ...