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  2. Five-dimensional space - Wikipedia

    en.wikipedia.org/wiki/Five-dimensional_space

    An important uniform 5-polytope is the 5-demicube, h{4,3,3,3} has half the vertices of the 5-cube (16), bounded by alternating 5-cell and 16-cell hypercells. The expanded or stericated 5-simplex is the vertex figure of the A 5 lattice, . It and has a doubled symmetry from its symmetric Coxeter diagram.

  3. Scalar field dark matter - Wikipedia

    en.wikipedia.org/wiki/Scalar_field_dark_matter

    The universe may be accelerating, fueled perhaps by a cosmological constant or some other field possessing long range 'repulsive' effects. A model must predict the correct form for the large scale clustering spectrum, [3] account for cosmic microwave background anisotropies on large and intermediate angular scales, and provide agreement with the luminosity distance relation obtained from ...

  4. Lambda-CDM model - Wikipedia

    en.wikipedia.org/wiki/Lambda-CDM_model

    The fraction of the total energy density of our (flat or almost flat) universe that is dark energy, , is estimated to be 0.669 ± 0.038 based on the 2018 Dark Energy Survey results using Type Ia supernovae [7] or 0.6847 ± 0.0073 based on the 2018 release of Planck satellite data, or more than 68.3% (2018 estimate) of the mass–energy density ...

  5. Intensity mapping - Wikipedia

    en.wikipedia.org/wiki/Intensity_mapping

    Jan 2004: Battye, Davies & Weller [5] propose using 21 cm intensity maps to measure dark energy. Jun 2006: Peterson, Bandura, and Pen [ 6 ] propose the Hubble Sphere Hydrogen Survey Mar 2009: Cosmological HI signal observed for the first time out to redshift 1.12 [ 7 ] by the Green Bank Telescope .

  6. Void (astronomy) - Wikipedia

    en.wikipedia.org/wiki/Void_(astronomy)

    Hence, although even the emptiest regions of voids contain more than ~15% of the average matter density of the universe, the voids look almost empty to an observer. [ 1 ] Voids typically have a diameter of 10 to 100 megaparsecs (30 to 300 million light-years ); particularly large voids, defined by the absence of rich superclusters , are ...

  7. File:Cosmological Composition – Pie Chart.svg - Wikipedia

    en.wikipedia.org/wiki/File:Cosmological...

    You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses ...

  8. Matter power spectrum - Wikipedia

    en.wikipedia.org/wiki/Matter_power_spectrum

    The co-moving wavenumber corresponding to the maximum power in the mass power spectrum is determined by the size of the cosmic particle horizon at the time of matter-radiation equality, and therefore depends on the mean density of matter and to a lesser extent on the number of neutrino families (), = (/) =, for = .

  9. List of voids - Wikipedia

    en.wikipedia.org/wiki/List_of_voids

    Voids are particularly galaxy-poor regions of space between filaments, making up the large-scale structure of the universe. Some voids are known as supervoids . In the tables, z is the cosmological redshift , c the speed of light , and h the dimensionless Hubble parameter , which has a value of approximately 0.7 (the Hubble constant H 0 = h × ...

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