New research suggests that dark energy isn't needed to explain the acceleration in the expansion of the universe — instead ...

Could time itself actually explain our universe's expansion? Our current cosmological model—known as lambda cold dark matter, ...

By looking at light from distant exploding stars called supernovas, in 1998 astronomers discovered the universe isn't just expanding—its expansion is speeding up. But what's behind this acceleration?

The universe has always intrigued scientists with its vastness and mystery. Decades ago, in the 1990s, physicists began ...

2024 was a big year for space science in many ways, but it may well prove to be the most important year for the universe's most troubling and mysterious "ingredient," dark energy, since its ...

Dark energy was introduced as a placeholder name for whatever force is driving this expansion. We now know that dark energy, whatever it is, accounts for 68% of the universe's matter and energy ...