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  2. Absolute space and time - Wikipedia

    en.wikipedia.org/wiki/Absolute_space_and_time

    Absolute, true and mathematical time, of itself, and from its own nature flows equably without regard to anything external, and by another name is called duration: relative, apparent and common time, is some sensible and external (whether accurate or unequable) measure of duration by the means of motion, which is commonly used instead of true ...

  3. Absolute theory - Wikipedia

    en.wikipedia.org/wiki/Absolute_theory

    According to the absolute theory of space, it is a homogeneous structure which exists and is independent of other things. [2] The Newtonian arguments of this theory, particularly those concerned with the ontological status of space and time, had been related to the existence of God through the concepts of absolute space and absolute time. [3]

  4. Cosmic time - Wikipedia

    en.wikipedia.org/wiki/Cosmic_time

    Cosmic time is the standard time coordinate for specifying the Friedmann–Lemaître–Robertson–Walker solutions of Einstein field equations of general relativity. [ 3 ] : 205 Such time coordinate may be defined for a homogeneous , expanding universe so that the universe has the same density everywhere at each moment in time (the fact that ...

  5. Spacetime - Wikipedia

    en.wikipedia.org/wiki/Spacetime

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

  6. History of special relativity - Wikipedia

    en.wikipedia.org/wiki/History_of_special_relativity

    Some scientists and philosophers of science were critical of Newton's definitions of absolute space and time. [36] [37] [38] Ernst Mach (1883) argued that absolute time and space are essentially metaphysical concepts and thus scientifically meaningless, and suggested that only relative motion between material bodies is a useful concept in ...

  7. Category:Space and time - Wikipedia

    en.wikipedia.org/wiki/Category:Space_and_time

    Download as PDF; Printable version; In other projects ... Pages in category "Space and time" ... Absolute space and time; P. Philosophy of space and time; S. Spatial ...

  8. Time - Wikipedia

    en.wikipedia.org/wiki/Time

    Time is the continuous progression of our changing existence that occurs in an apparently irreversible succession from the past, through the present, and into the future. [1] [2] [3] It is a component quantity of various measurements used to sequence events, to compare the duration of events (or the intervals between them), and to quantify rates of change of quantities in material reality or ...

  9. Proper time - Wikipedia

    en.wikipedia.org/wiki/Proper_time

    The proper time interval between two events on a world line is the change in proper time, which is independent of coordinates, and is a Lorentz scalar. [1] The interval is the quantity of interest, since proper time itself is fixed only up to an arbitrary additive constant, namely the setting of the clock at some event along the world line.