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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 Space-Time? Einstein's Theory of Time and Gravity …

    Jul 31, 2025 · What is space-time? Depending on how fast you're moving or how close you are to Earth's gravity can change the way time feels.

  5. Does Space-Time Really Exist? - SciTechDaily

    Sep 14, 2025 · Few ideas in modern science have changed how we understand reality as deeply as space-time, the intertwined union of space and time at the core of Albert Einstein’s theory …

  6. 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 …

  7. 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 …

  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. Space-TimeThe Physics Hypertextbook

    At speeds approaching the speed of light, objects get shorter and time slows down. This means that space and time are one unified, dynamic thing — space-time.

  10. 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.