In 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...

the mass–energy content of the universe is 5% ordinary matter, 26.8% dark matter, and 68.2% a form of energy known as dark energy. Thus, dark matter constitutes...

A dark-energy star is a hypothetical compact astrophysical object, which a minority of physicists think might constitute an alternative explanation for...

BAO measurements help cosmologists understand more about the nature of dark energy (which causes the accelerating expansion of the universe) by constraining...

Recent results suggest that we have already entered an era dominated by dark energy, but examination of the roles of matter and radiation are most important...

The Dark Energy Survey (DES) is an astronomical survey designed to constrain the properties of dark energy. It uses images taken in the near-ultraviolet...

The Dark Energy Spectroscopic Instrument (DESI) is a scientific research instrument for conducting spectrographic astronomical surveys of distant galaxies...

accelerating, an observation attributed to an unexplained phenomenon known as dark energy. The Big Bang models offer a comprehensive explanation for a broad range...

mass and energy in the universe while about 69.2%±1.2% is dark energy, a mysterious form of energy responsible for the acceleration of the expansion of the...

The Joint Dark Energy Mission (JDEM) was an Einstein probe that planned to focus on investigating dark energy. JDEM was a partnership between NASA and...

and is still doing so. Physicists have postulated the existence of dark energy, appearing as a cosmological constant in the simplest gravitational models...

dominated by radiation or dark energy, the existence of voids is significant in providing physical evidence for dark energy. The structure of the Universe...

positive vacuum energy, dubbed "dark energy". While there are alternative possible explanations, the description assuming dark energy (positive Λ) is...

Alcubierre drive implies a negative energy density and therefore requires exotic matter or manipulation of dark energy. If exotic matter with the correct...

experimental evidence from the expansion of the universe, dark energy and the Casimir effect shows any such energy to be exceptionally weak. One proposal that attempts...

dark energy. Dark energy is now believed to be the single largest component of the universe, as it constitutes about 68.3% of the entire mass–energy of...

fluid (see dark fluid), or hypothesize that dark matter could decay into dark energy. In Lambda-CDM, dark energy is an unknown form of energy that tends...

This model requires the universe to contain large amounts of dark matter and dark energy whose nature is currently not well understood, but the model...

nearly always by invoking dark energy, which in its simplest form is just a positive cosmological constant. In general, dark energy is a catch-all term for...

as can a dark energy component in the early universe, dark energy with a time-varying equation of state, or dark matter that decays into dark radiation...

model of 2007 assumes an exotic form of dark energy called phantom energy, which possesses negative kinetic energy and would usually cause the universe to...

physicists have proposed that a "Big Crunch-style" event could result from a dark energy fluctuation. The hypothesis dates back to 1922, with Russian physicist...

expansion rate appears to be accelerating, which dark energy was proposed to explain. Assuming dark energy remains constant (an unchanging cosmological constant)...

In the renewable energy sector, a dunkelflaute (German: [ˈdʊŋkəlˌflaʊtə] , lit. 'dark doldrums' or 'dark wind lull', plural dunkelflauten) is a period...

as the "Big Chill" or "Big Freeze". If dark energy—represented by the cosmological constant, a constant energy density filling space homogeneously, or...

timing? Is dark energy a pure cosmological constant or are models of quintessence such as phantom energy applicable? Do early dark energy models resolve...

Chameleon particle a possible candidate for dark energy Acceleron particle another candidate for dark energy A bradyon (or tardyon) travels slower than...

Unsolved problem in physics: Why is the vacuum energy density much smaller than a zero-point energy suggested by quantum field theory? (more unsolved problems...

model, there are important components of Ω due to baryons, cold dark matter and dark energy. The spatial geometry of the universe has been measured by the...

relationship between pressure p and energy density ρ[jargon]. The central region consists of false vacuum or "dark energy", and in this region p = −ρ . Surrounding...