Mar 7, 2025 · What Exactly is Dark Energy? 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 described by some as having the effect of a negative pressure that is pushing space outward.

Mar 19, 2025 · Everything scientists can observe in the universe, from people to planets, is made of matter. Matter is defined as any substance that has mass and occupies space. But there’s more to the universe than the matter we can see. Dark matter is a mysterious substance that affects and shapes the cosmos, and scientists are still trying to figure it out.

Feb 8, 2024 · The new mission will advance the exploration of the dark energy mystery in ways that other telescopes can’t by mapping how matter is structured and distributed throughout the cosmos, and also by measuring large numbers of distant supernovae.

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 is dominated by empty space emitting …

Oct 22, 2024 · Dark matter and dark energy are mysterious substances that affect and shape the cosmos, and scientists are still trying to figure them out. The universe is made up of three components: normal or visible matter (5%), dark matter (27%), and dark energy (68%).

Oct 22, 2024 · Hubble made the key observations that led to the discovery of dark energy. Astronomers looked at a special kind of supernovae, called Type 1a, that give off a set amount of light when a certain type of star explodes.

Nov 16, 2006 · Scientists using NASA's Hubble Space Telescope have discovered that dark energy is not a new constituent of space, but rather has been present for most of the universe's history. Dark energy is a mysterious repulsive force that …

Team Preps to Study Dark Energy via Exploding Stars With NASA’s Roman 6 min read The universe is ballooning outward at an ever-faster clip under the power of an unknown force dubbed dark energy.

Sep 20, 2016 · In the early 1990s, scientists believed that gravity should be slowing the expansion of the universe. However, in 1998 observations of very distant supernovae showed that a long time ago the universe was actually expanding more slowly than it is today.

Jan 2, 2024 · 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 galaxies in the early universe.