The theory of relativity comprises two physics theories by Albert Einstein: special relativity and general relativity, proposed and published in 1905 and 1915, respectively. Special relativity applies to all physical phenomena in the absence of gravity. General relativity explains the law of gravitation and its relation to the forces of nature. It applies to the cosmological and astrophysical realm, including astronomy.
Key Facts
| Subject | Theory of relativity |
| Category | Two interrelated physics theories by Albert Einstein |
| Reading time | 1 min · Intermediate |
| Key date | 1905 |
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