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.
What is Dark Energy? Inside our accelerating, expanding Universe
WEBFeb 5, 2024 · Some scientists think that dark energy is a fundamental, ever-present background energy in space known as vacuum energy, which could be equal to the cosmological constant, a mathematical term in the equations of …
The largest 3-D map of the universe reveals hints of dark energy’s …
WEBApr 4, 2024 · Researchers have made the largest 3-D map of the universe to study the properties of dark energy. Here a thin slice through the map is shown, with a magnified section revealing further detail....
Dark energy is one of the biggest puzzles in science and we’re …
WEBJan 8, 2024 · Since the discovery of dark energy in 1998, the value of its equation of state has been a fundamental question. This state describes the ratio of pressure over energy density for a...
WEBWhat is meant by dark energy? “Dark energy” is the new terminology for the cosmological constant. λ/κ is the energy per volume of empty space! Einstein’s equations of general relativity (modern notation, λ → Λ): −G = Tµν κ µν curvature = mass/energy density + …
Dark energy | Definition, Discoverers, & Facts | Britannica
WEBThe goals of most observational studies of dark energy are to measure its equation of state (the ratio of its pressure to its energy density), variations in its properties, and the degree to which dark energy provides a complete description of gravitational physics.
Reconstruction of the Dark Energy Equation of State from the …
WEBApr 6, 2018 · The main property of dark energy is the equation of state (EoS) parameter w, which is defined as the ratio of pressure P to the energy density ρ of dark energy. This parameter is one of the crucial parameters for characterizing the nature of dark energy.
Dark energy is tearing the Universe apart. What if the force
WEBMay 3, 2024 · What if the force is weakening? The first set of results from a pioneering cosmic-mapping project hints that the repulsive force known as dark energy has changed over 11 billion years, which...
WEBIf dark energy is something within space, then it should grow more dilute as space expands. It all comes down to measuring the ultrasimple “equation of state” of dark energy and whether a single parameter, denoted w, equals−1, for a cosmological constant, or something like –0.9 for a quintessence. To probe dark energy, astronomers can ...
What is dark energy? - Nature
WEBSep 29, 2004 · To describe the different possibilities for dark energy, an ‘equation-of-state’ parameter, w, is defined. This is the ratio of the pressure to the energy of the material.
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