Feb 6, 2026 · But the cosmos wouldn’t stay this way. Nine billion years after the universe began, its expansion started to speed up, driven by an unknown force that scientists have named dark energy. …

Aug 8, 2025 · Astronomers discuss Hubble's investigation of dark energy, the mysterious force causing the expansion of the universe to accelerate.

Sep 9, 2025 · To figure out whether dark energy truly exists (and, if so, what it actually is), scientists are studying how it behaves. But it seems the more we learn about the mystery, the more perplexing it …

Aug 29, 2025 · Dark energy is the name scientists have given to whatever is causing our universe to expand at an accelerating rate over time — another cosmic mystery. Dark energy isn't concentrated …

Sep 16, 2025 · The implication that the universe is dominated by an unknown entity, now called "dark energy," that counters the attractive force of gravity, may revolutionize our understanding of …

The universe is ballooning outward at an ever-faster clip under the power of an unknown force dubbed dark energy. One…

3 days ago · From determining the atmospheric composition of planets around other stars to discovering dark energy, Hubble has changed humanity's understanding of the universe.

Dec 23, 2025 · Many scientists believe an invisible force, called “dark energy,” causes this acceleration. We can think of dark energy as an “antigravity” or repelling force that pushes galaxies apart by …

Feb 27, 2004 · Dark energy has the cosmoslogists scratching their heads. Observations taken by NASA's Hubble Space Telescope and future space telescopes will be needed in order to determine …

Feb 20, 2004 · When astronomers first realized the universe was accelerating, the conventional wisdom was that it would expand forever. However, until we better understand the nature of dark energy – its …