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  2. List of voids - Wikipedia

    en.wikipedia.org/wiki/List_of_voids

    major void SRSS1 Void 3 (Sculptor Void) 6 3 h 56 m −20° 11′ 56.5 32.0 Eridanus: major void: 7 3 h 17 m −11° 40′ 77.2 25.5 Eridanus: major void: 8 23 h 20 m −12° 32′ 83.9 27.8 Aquarius: major void: 9 3 h 06 m −13° 47′ 114.6 39.0 Eridanus: major void: 10 0 h 26 m −9° 17′ 104.7 34.8 Cetus: major void: 11 0 h 21 m −29 ...

  3. List of chaotic maps - Wikipedia

    en.wikipedia.org/wiki/List_of_chaotic_maps

    In mathematics, a chaotic map is a map (an evolution function) that exhibits some sort of chaotic behavior. Maps may be parameterized by a discrete-time or a continuous-time parameter. Discrete maps usually take the form of iterated functions. Chaotic maps often occur in the study of dynamical systems.

  4. Entropy (information theory) - Wikipedia

    en.wikipedia.org/wiki/Entropy_(information_theory)

    The inspiration for adopting the word entropy in information theory came from the close resemblance between Shannon's formula and very similar known formulae from statistical mechanics. In statistical thermodynamics the most general formula for the thermodynamic entropy S of a thermodynamic system is the Gibbs entropy

  5. CMB cold spot - Wikipedia

    en.wikipedia.org/wiki/CMB_cold_spot

    One possible explanation of the cold spot is a huge void between us and the primordial CMB. A region cooler than surrounding sightlines can be observed if a large void is present, as such a void would cause an increased cancellation between the "late-time" integrated Sachs–Wolfe effect and the "ordinary" Sachs–Wolfe effect. [10]

  6. Orders of magnitude (entropy) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(entropy)

    Entropy equivalent of one bit of information, equal to k times ln(2) [1] 10 −23: 1.381 × 10 −23 J⋅K −1: Boltzmann constant, entropy equivalent of one nat of information. 10 1: 5.74 J⋅K −1: Standard entropy of 1 mole of graphite [2] 10 33: ≈ 10 35 J⋅K −1: Entropy of the Sun (given as ≈ 10 42 erg⋅K −1 in Bekenstein (1973 ...

  7. Void (astronomy) - Wikipedia

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

    The cosmological evolution of the void regions differs drastically from the evolution of the universe as a whole: there is a long stage when the curvature term dominates, which prevents the formation of galaxy clusters and massive galaxies. Hence, although even the emptiest regions of voids contain more than ~15% of the average matter density ...

  8. Local Hole - Wikipedia

    en.wikipedia.org/wiki/Local_Hole

    The KBC Void (or Local Hole) is an immense, comparatively empty region of space, named after astronomers Ryan Keenan, Amy Barger, and Lennox Cowie, who studied it in 2013. [1] The existence of a local underdensity has been the subject of many pieces of literature and research articles.

  9. Local Void - Wikipedia

    en.wikipedia.org/wiki/Local_Void

    The Local Void is a vast, empty region of space, lying adjacent to the Local Group. [ 3 ] [ 4 ] Discovered by Brent Tully and Rick Fisher in 1987, [ 5 ] the Local Void is now known to be composed of three separate sectors, separated by bridges of "wispy filaments ". [ 4 ]