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  2. Four-dimensional space - Wikipedia

    en.wikipedia.org/wiki/Four-dimensional_space

    Four-dimensional space ( 4D) is the mathematical extension of the concept of three-dimensional space (3D). Three-dimensional space is the simplest possible abstraction of the observation that one needs only three numbers, called dimensions, to describe the sizes or locations of objects in the everyday world.

  3. International Space Station - Wikipedia

    en.wikipedia.org/wiki/International_Space_Station

    The International Space Station(ISS) is a large space stationassembledand maintained in low Earth orbitby a collaboration of five space agencies and their contractors: NASA(United States), Roscosmos(Russia), JAXA(Japan), ESA(Europe), and CSA(Canada). The ISS is the largest space station ever built.

  4. Mass in general relativity - Wikipedia

    en.wikipedia.org/wiki/Mass_in_general_relativity

    Like the SPI group at spatial infinity, the BMS group at null infinity is infinite-dimensional, and it also has a preferred 4-parameter subgroup of "pure" translations. Another approach to the problem of energy in General Relativity is the use of pseudotensors such as the Landau–Lifshitz pseudotensor .(Landau and Lifshitz, 1962).

  5. List of most-downloaded Google Play applications - Wikipedia

    en.wikipedia.org/wiki/List_of_most-downloaded...

    This is the list of the Google Play paid apps with more than 5 million and less than ten million downloads on unique devices: App. Developer. Date Reached [o] Date Published [p] Category. Price. True Skate [407] True Axis.

  6. Spacetime - Wikipedia

    en.wikipedia.org/wiki/Spacetime

    In physics, spacetime is a mathematical model that fuses the three dimensions of space and the one dimension of time into a single four-dimensional (measurement)|continuum]]. Spacetime diagrams are useful in visualizing and understanding relativistic effects such as how different observers perceive where and when events occur.

  7. Spatial (platform) - Wikipedia

    en.wikipedia.org/wiki/Spatial_(platform)

    spatial .io. Spatial is an Unity -powered UGC gaming platform that enables developers to publish and monetize multiplayer games across web, mobile, and VR. [1] Spatial focuses on games developed using the Unity game engine and the C# programming language. [2] The company is headquartered in New York. [3]

  8. Einstein field equations - Wikipedia

    en.wikipedia.org/wiki/Einstein_field_equations

    v. t. e. In the general theory of relativity, the Einstein field equations ( EFE; also known as Einstein's equations) relate the geometry of spacetime to the distribution of matter within it. [1] The equations were published by Albert Einstein in 1915 in the form of a tensor equation [2] which related the local spacetime curvature (expressed by ...

  9. AdS black hole - Wikipedia

    en.wikipedia.org/wiki/AdS_black_hole

    Such a solution asymptotically approaches anti-de Sitter space at spatial infinity, and is a generalization of the Kerr vacuum solution, which asymptotically approaches Minkowski spacetime at spatial infinity. In 3+1 dimensions, the metric is given by