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  1. Spacetime - Wikipedia

    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 …

  2. What Is Spacetime? The Four-Dimensional Fabric of Reality

    May 24, 2025 · Albert Einstein, through his groundbreaking work on relativity, dramatically changed our understanding of space and time. The key insight he brought was that space and …

  3. Space-time | Definition & Facts | Britannica

    Nov 11, 2025 · space-time, in physical science, single concept that recognizes the union of space and time, first proposed by the mathematician Hermann Minkowski in 1908 as a way to …

  4. What is space-time? - Live Science

    May 20, 2021 · Space-time is the conceptual model that best explains how the universe works. (Image credit: Shutterstock) The fabric of space-time is a conceptual model combining the …

  5. What Is Spacetime Really Made Of? - Scientific American

    Feb 1, 2022 · Specifically, spacetime might emerge from the materials we usually think of as living in the universe—matter and energy itself.

  6. GP-B — Einstein's Spacetime

    Gravity feels strongest where spacetime is most curved, and it vanishes where spacetime is flat. This is the core of Einstein's theory of general relativity, which is often summed up in words as …

  7. What is spacetime? - BBC Sky at Night Magazine

    May 28, 2025 · What is spacetime, and is time really all a matter of perspective? Find out in our beginner's guide to the complexities of time and space.

  8. Spacetime | Brilliant Math & Science Wiki

    In physics, spacetime is any mathematical model that combines space and time into a single continuum. It is a mathematical concept used to refer to all points of space and time and their …

  9. Special and General Relativity - Physics of the Universe

    Thus, space and time are effectively interchangeable, and fundamentally the same thing (or at least two different sides of the same coin), an effect which becomes much more noticeable at …

  10. What Is Spacetime, Really?—Stephen Wolfram Writings

    Dec 2, 2015 · A hundred years ago today Albert Einstein published his General Theory of Relativity—a brilliant, elegant theory that has survived a century, and provides the only …