Definition:Mean Sun
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Definition
The mean sun is an imaginary point on the celestial sphere that moves along the celestial equator with a uniform rate of motion equal to the mean rate of motion of the sun along the ecliptic.
Sources
- 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): day
- 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): day