What is Dark Energy? Inside our accelerating, expanding Universe
WEBFeb 5, 2024 · 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.
Dark energy - Wikipedia
WEBIn physical cosmology and astronomy, dark energy is a proposed form of energy that affects the universe on the largest scales. Its primary effect is to drive the accelerating expansion of the universe.
Dark Matter & Dark Energy - Science@NASA
WEBMatter 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 and dark energy are mysterious substances that affect and shape the cosmos, and scientists are still trying to figure them out. Learn more.
What is dark energy? | Space
WEBNov 24, 2022 · Dark energy is a hypothetical form of energy that is proposed by physicists to explain why the universe is not just expanding but is doing so at an accelerating rate. Think of dark energy...
Dark Matter and Dark Energy | National Geographic
WEBThe rest of the universe appears to be made of a mysterious, invisible substance called dark matter (25 percent) and a force that repels gravity known as dark energy (70 percent).
Dark Energy and Dark Matter | Center for Astrophysics | Harvard ...
WEBThe rest is composed of dark matter and dark energy, which are invisible but dominate the structure and evolution of the universe. Dark matter makes up most of the mass of galaxies and galaxy clusters, and is responsible for the way galaxies are organized on grand scales.
Dark energy is tearing the Universe apart. What if the force
WEBMay 3, 2024 · A consensus emerged around a theory called Λ cold dark matter (ΛCDM), in which cosmic history is largely the result of a struggle between the pull of dark matter and the push of dark...
Dark Energy Changes the Universe - Science@NASA
WEBFeb 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 a repulsive form of gravity that is pushing the universe apart.
which causes the expansion of the universe — may be changing - NPR
WEBJul 23, 2024 · One of the big mysteries of the universe is how it's expanding. The phenomenon causing that expansion is known as dark energy — and recently, scientists have started to wonder if its changing.
Dark energy | Definition, Discoverers, & Facts | Britannica
WEBdark energy, repulsive force that is the dominant component (69.4 percent) of the universe. The remaining portion of the universe consists of ordinary matter and dark matter. Dark energy, in contrast to both forms of matter, is relatively uniform in time and space and is gravitationally repulsive, not attractive, within the volume it occupies.