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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. A simplified introduction to Einstein’s theory of relativity

    Jan 26, 2017 · As complex as the theory of relativity seems to be, it’s surprisingly simple. In this short article, we will explain what Einstein proposes to give you some insight.

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

    Oct 24, 2025 · With his theories of special relativity (1905) and general relativity (1915), Einstein overthrew many assumptions underlying earlier physical theories, redefining in the process the …

  4. 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...

  5. 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.

  6. 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 …

  7. Relativity Explained | Time-Space Theory & Impact

    May 27, 2024 · The theory of relativity, introduced by Albert Einstein in the early 20th century, revolutionized our understanding of space, time, and gravity. This groundbreaking theory is divided …

  8. 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. …

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

    Jan 28, 2022 · For example, Einstein's Theory of Relativity comes in two parts: the Special Theory of Relativity (SR and the General Theory of Relativity (GR). And the term "Relativity" itself...

  10. 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 …