Dark energy is the mysterious component driving the accelerating expansion of the universe, accounting for roughly 68 percent of its total energy. Discovered in 1998 through observations of distant supernovae, it behaves like a pressure pushing space apart. Whether it is a constant property of empty space or something that changes over time is one of the biggest open questions in cosmology, and recent survey data have hinted that it may not be constant after all.
Cosmology · Dark Energy · DESI
For thirty years, dark energy has been the most powerful force in cosmology, a steady push driving every galaxy apart forever. In April 2025, a five-y...
Cosmology · Dark Energy · Expansion
It is the most natural question to ask. Galaxies are flying apart. The space between them is growing. So where is it going? The answer turns out to be...