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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. Space-time | Definition & Facts | Britannica

    Dec 18, 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 …

  3. What, exactly, is space-time? - Phys.org

    Aug 25, 2025 · Few ideas in modern science have reshaped our understanding of reality more profoundly than space-time—the interwoven fabric of space and time at the heart of Albert …

  4. 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 …

  5. 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 …

  6. What Is Space-Time? Einstein's Theory of Time and Gravity …

    Jul 31, 2025 · Space-time compression focuses on how the world seems smaller now that we have more access to it, not time in space. Space-time vs. Earth time depends on where you …

  7. What, exactly, is space-time? - The Conversation

    Aug 24, 2025 · Space-time is frequently described as the “ fabric of reality.” In some accounts, this fabric is referred to as a fixed, four-dimensional “ block universe ” — a complete map of all …

  8. 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 …

  9. 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 …

  10. 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 …