
Dark Energy - NASA Science
Sep 9, 2025 · Though weak on small scales, dark energy dominates across vast stretches of the cosmos. It makes up about 68% of the universe's total contents, but so far we don't know much more …
What is Dark Energy? Inside Our Accelerating, Expanding Universe
May 2, 2025 · Right now, dark energy is just the name that astronomers gave to the mysterious "something" that is causing the universe to expand at an accelerated rate. Dark energy has been …
Hubble Dark Energy - NASA Science
Aug 8, 2025 · Astronomers discuss Hubble's investigation of dark energy, the mysterious force causing the expansion of the universe to accelerate.
Physics of the Cosmos About - NASA Science
Nov 24, 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 …
Dark Energy Changes the Universe - Science@NASA
Feb 27, 2004 · Hubble observations suggest the dark energy may be Einstein's cosmological constant, an energy percolating out of the vacuum of the space between galaxies. The energy of the universe …
Dark Matter - Science@NASA
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 …
Building Blocks - NASA Science
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 explain the …
Expand our Knowledge of Dark Energy - NASA Science
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 …
Discovering a Runaway Universe - NASA Science
Aug 8, 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 …
Dark Energy Explorers - NASA Science
Oct 10, 2025 · 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 …