• Thumbnail for Dark energy
    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...
    85 KB (9,522 words) - 06:58, 20 December 2024
  • Thumbnail for Dark matter
    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...
    136 KB (14,800 words) - 13:54, 23 December 2024
  • A dark-energy star is a hypothetical compact astrophysical object, which a minority of physicists think might constitute an alternative explanation for...
    6 KB (617 words) - 17:23, 25 June 2024
  • Thumbnail for Baryon acoustic oscillations
    BAO measurements help cosmologists understand more about the nature of dark energy (which causes the accelerating expansion of the universe) by constraining...
    26 KB (3,220 words) - 01:43, 21 September 2024
  • 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...
    13 KB (1,938 words) - 02:20, 9 October 2024
  • Thumbnail for Universe
    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...
    157 KB (16,470 words) - 14:11, 26 November 2024
  • Thumbnail for Dark Energy Survey
    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...
    50 KB (5,469 words) - 04:27, 25 July 2024
  • Thumbnail for Dark Energy Spectroscopic Instrument
    The Dark Energy Spectroscopic Instrument (DESI) is a scientific research instrument for conducting spectrographic astronomical surveys of distant galaxies...
    22 KB (2,498 words) - 21:43, 13 November 2024
  • Thumbnail for Big Bang
    accelerating, an observation attributed to an unexplained phenomenon known as dark energy. The Big Bang models offer a comprehensive explanation for a broad range...
    150 KB (16,172 words) - 15:00, 7 December 2024
  • Thumbnail for Joint Dark Energy Mission
    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...
    7 KB (888 words) - 21:59, 11 July 2023
  • Thumbnail for Expansion of the universe
    and is still doing so. Physicists have postulated the existence of dark energy, appearing as a cosmological constant in the simplest gravitational models...
    53 KB (6,980 words) - 06:12, 4 December 2024
  • Thumbnail for Accelerating expansion of the universe
    positive vacuum energy, dubbed "dark energy". While there are alternative possible explanations, the description assuming dark energy (positive Λ) is...
    39 KB (4,805 words) - 08:34, 6 November 2024
  • Thumbnail for Void (astronomy)
    dominated by radiation or dark energy, the existence of voids is significant in providing physical evidence for dark energy. The structure of the Universe...
    37 KB (4,466 words) - 00:59, 18 November 2024
  • Thumbnail for Alcubierre drive
    Alcubierre drive implies a negative energy density and therefore requires exotic matter or manipulation of dark energy. If exotic matter with the correct...
    44 KB (5,455 words) - 19:15, 6 December 2024
  • Thumbnail for Zero-point energy
    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...
    209 KB (26,941 words) - 14:00, 28 October 2024
  • Thumbnail for Chronology of the universe
    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...
    138 KB (13,948 words) - 13:51, 23 December 2024
  • Thumbnail for Non-standard cosmology
    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...
    35 KB (4,546 words) - 16:38, 11 December 2024
  • Thumbnail for Physical cosmology
    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...
    77 KB (7,671 words) - 07:27, 19 December 2024
  • Thumbnail for Ultimate fate of the universe
    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...
    36 KB (4,313 words) - 12:16, 4 November 2024
  • Thumbnail for Hubble's law
    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...
    129 KB (12,703 words) - 22:11, 21 December 2024
  • Thumbnail for Cyclic model
    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...
    14 KB (1,615 words) - 00:32, 5 December 2024
  • Thumbnail for Big Crunch
    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...
    23 KB (2,890 words) - 23:46, 8 December 2024
  • Thumbnail for Observable universe
    expansion rate appears to be accelerating, which dark energy was proposed to explain. Assuming dark energy remains constant (an unchanging cosmological constant)...
    64 KB (6,628 words) - 10:39, 18 December 2024
  • Thumbnail for Dunkelflaute
    Dunkelflaute (redirect from Dark doldrums)
    In the renewable energy sector, a dunkelflaute (German: [ˈdʊŋkəlˌflaʊtə] , lit. 'dark doldrums' or 'dark wind lull', plural dunkelflauten) is a period...
    12 KB (1,230 words) - 08:23, 16 December 2024
  • Thumbnail for Future of an expanding universe
    as the "Big Chill" or "Big Freeze". If dark energy—represented by the cosmological constant, a constant energy density filling space homogeneously, or...
    52 KB (5,660 words) - 02:44, 23 December 2024
  • timing? Is dark energy a pure cosmological constant or are models of quintessence such as phantom energy applicable? Do early dark energy models resolve...
    29 KB (3,253 words) - 05:28, 23 December 2024
  • Chameleon particle a possible candidate for dark energy Acceleron particle another candidate for dark energy A bradyon (or tardyon) travels slower than...
    33 KB (3,050 words) - 01:45, 2 December 2024
  • Thumbnail for Cosmological constant problem
    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...
    21 KB (2,467 words) - 08:25, 10 December 2024
  • Thumbnail for List of cosmologists
    Albrecht studied the formation of the early universe, cosmic structure, and dark energy Hannes Alfvén (1908–1995) theorized that galactic magnetic fields could...
    20 KB (2,499 words) - 17:34, 16 September 2024
  • Thumbnail for Friedmann equations
    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...
    22 KB (3,523 words) - 19:20, 23 November 2024