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  1. Theory of relativity - Wikipedia

    The theory of relativity usually encompasses two interrelated physics theories by Albert Einstein: special relativity and general relativity, proposed and published in 1905 and 1915, respectively. [1] Special …

  2. Relativity | Definition, Equations, & Facts | Britannica

    Oct 24, 2025 · Relativity, wide-ranging physical theories formed by the German-born physicist Albert Einstein. Special relativity is limited to objects that are moving with respect to inertial frames of …

  3. What is the theory of general relativity? Understanding Einstein's ...

    Oct 29, 2024 · General relativity is physicist Albert Einstein's understanding of how gravity affects the fabric of space-time. The theory, which Einstein published in 1915, expanded the theory of...

  4. What Is Relativity? Einstein’s Groundbreaking Theory Explained

    May 5, 2025 · Einstein’s theory of relativity was not just a correction to Newton—it was a revolution in thought. It showed that space and time are not rigid and eternal but fluid and intertwined.

  5. It's All Relative: Einstein's Theory of Relativity

    Nov 25, 2025 · 110 years ago today, Albert Einstein published his General Theory of Relativity, which redefined the relationship between matter and gravity. Suddenly, our mysterious universe made a …

  6. Einstein's Theory of Relativity - ThoughtCo

    May 14, 2025 · Einstein's Theory of Relativity includes both general relativity and special relativity. Special relativity shows that time and space are not absolute and depend on the observer's motion. …

  7. What is Einstein's Theory of Relativity? - Universe Today

    Jan 28, 2022 · But the most famous and renowned is arguably Albert Einstein, Relativity, and the famous equation, E=mc2. In fact, Relativity may be the best-known scientific concept that few people …

  8. Science Made Simple: What Is the Theory of Relativity?

    Nov 25, 2023 · What Is the Theory of Relativity? Relativity is two related theories: special relativity, which explains the relationship between space, time, mass, and energy; and general relativity, which …

  9. Special and General Relativity - Physics of the Universe

    The “ theory of relativity ” (or simply “ relativity ”) generally refers to two theories of Albert Einstein, his Special Theory of Relativity (or simply special relativity) of 1905, and his General Theory of Relativity …

  10. Deep Dive into Einstein’s Theory of Relativity - Philosophy Institute

    Nov 3, 2023 · Einstein’s relativity theories extend beyond physics into philosophy, challenging our intuitive understanding of reality. The merging of space and time into a single continuum forces us to …