May 2, 2025 · 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 …

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 …

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 …

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 …

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 …

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

Oct 22, 2024 · Dark energy may compose roughly 68% of the universe, but scientists know even less about it than they do about dark matter. But something like dark energy must exist to …

Oct 22, 2024 · Dark matter remains one of the universe’s most perplexing mysteries, but Hubble’s observations have provided compelling evidence for its existence and charted its effects.

Help illuminate the mystery of dark energy - the unknown force that is driving galaxies away from one another! Dark Energy Explorers are creating the largest and most detailed map yet of …