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“relativity”
Primarily, a theory developed by Albert Einstein which states that the way anything, except light, moves through time and space depends on the position and movement of the person who is observing or watching it: "Relativity is considered to be the dependence of various physical phenomena on the comparative motions of the observer and the objects that are seen; especially, regarding the nature and behavior of light, space, time, and gravity."
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later-, lateral-, -late, -lat, -lation, -lative
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“relativity”
Theories of physics proposed by Albert Einstein in 1905 to explain the influence of the relative motion and position of an observer on his own observations: Relativity refers to the nature of physical occurrences of light, mass, time, and gravity on the relative motion between a viewer and the object being viewed.
They say, among other things, that space and time can not be considered separate ideas. The perception of space-time is different for a person standing still on Earth than it is for someone moving very fast away from or toward it.
What we see is "relative" to, or dependent on, our acceleration as we move.
The General Theory of Relativity, published in 1916, defined gravitation as a function of four-dimensional space-time.
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Astronomy and related astronomical terms
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