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Mean sun

Mean Mean, a. [OE. mene, OF. meiien, F. moyen, fr. L. medianus that is in the middle, fr. medius; akin to E. mid. See Mid.] 1. Occupying a middle position; middle; being about midway between extremes. Being of middle age and a mean stature. --Sir. P. Sidney. 2. Intermediate in excellence of any kind. According to the fittest style of lofty, mean, or lowly. --Milton. 3. (Math.) Average; having an intermediate value between two extremes, or between the several successive values of a variable quantity during one cycle of variation; as, mean distance; mean motion; mean solar day. Mean distance (of a planet from the sun) (Astron.), the average of the distances throughout one revolution of the planet, equivalent to the semi-major axis of the orbit. Mean error (Math. Phys.), the average error of a number of observations found by taking the mean value of the positive and negative errors without regard to sign. Mean-square error, or Error of the mean square (Math. Phys.), the error the square of which is the mean of the squares of all the errors; -- called also, especially by European writers, mean error. Mean line. (Crystallog.) Same as Bisectrix. Mean noon, noon as determined by mean time. Mean proportional (between two numbers) (Math.), the square root of their product. Mean sun, a fictitious sun supposed to move uniformly in the equator so as to be on the meridian each day at mean noon. Mean time, time as measured by an equable motion, as of a perfect clock, or as reckoned on the supposition that all the days of the year are of a mean or uniform length, in contradistinction from apparent time, or that actually indicated by the sun, and from sidereal time, or that measured by the stars.

Mean Mean, a. [OE. mene, OF. meiien, F. moyen, fr. L. medianus that is in the middle, fr. medius; akin to E. mid. See Mid.] 1. Occupying a middle position; middle; being about midway between extremes. Being of middle age and a mean stature. --Sir. P. Sidney. 2. Intermediate in excellence of any kind. According to the fittest style of lofty, mean, or lowly. --Milton. 3. (Math.) Average; having an intermediate value between two extremes, or between the several successive values of a variable quantity during one cycle of variation; as, mean distance; mean motion; mean solar day. Mean distance (of a planet from the sun) (Astron.), the average of the distances throughout one revolution of the planet, equivalent to the semi-major axis of the orbit. Mean error (Math. Phys.), the average error of a number of observations found by taking the mean value of the positive and negative errors without regard to sign. Mean-square error, or Error of the mean square (Math. Phys.), the error the square of which is the mean of the squares of all the errors; -- called also, especially by European writers, mean error. Mean line. (Crystallog.) Same as Bisectrix. Mean noon, noon as determined by mean time. Mean proportional (between two numbers) (Math.), the square root of their product. Mean sun, a fictitious sun supposed to move uniformly in the equator so as to be on the meridian each day at mean noon. Mean time, time as measured by an equable motion, as of a perfect clock, or as reckoned on the supposition that all the days of the year are of a mean or uniform length, in contradistinction from apparent time, or that actually indicated by the sun, and from sidereal time, or that measured by the stars.

- of the Sun in the sky. The fundamental unit of solar time is the day. Two types of solar time are apparent solar time (sundial time) and mean solar time...

- brightest star, Sirius, which has an apparent magnitude of −1.46. The mean distance of the Sun's center to Earth's center is approximately 1 astronomical unit...

- which directly tracks the diurnal motion of the Sun, and mean solar time, which tracks a theoretical mean Sun with uniform motion. Apparent solar time can...

- Chicago Sun-Times inducted Mean Streets into his Great Movies list and wrote: "In countless ways, right down to the detail of modern TV crime shows, Mean Streets...

- "The natural basis for computing p****ing tropical years is the mean longitude of the Sun reckoned from the precessionally moving equinox (the dynamical...

- gives the Right ascension of the fictitious mean Sun, affected by aberration (which is used in finding mean solar time) as τ = 18h 38m 45.836s + 8640184...

- "true sun" pointer in addition to the mean Sun pointer likewise, to track the elliptical anomaly of the Sun (the orbit of Earth around the Sun), but there...

- the fixed stars before the mean Sun can p**** overhead again, even though it rotates only once (360°) relative to the mean Sun. Multiplying the value in...

- the region enclosed by the Moon's orbit of the Sun is a convex set. Solar System portal The geometric mean distance in the orbit (of ELP) M. Chapront-Touzé;...

- Sun-synchronous orbit might ascend across the equator twelve times a day each time at approximately 15:00 mean local time. Special cases of the Sun-synchronous...

- brightest star, Sirius, which has an apparent magnitude of −1.46. The mean distance of the Sun's center to Earth's center is approximately 1 astronomical unit...

- which directly tracks the diurnal motion of the Sun, and mean solar time, which tracks a theoretical mean Sun with uniform motion. Apparent solar time can...

- Chicago Sun-Times inducted Mean Streets into his Great Movies list and wrote: "In countless ways, right down to the detail of modern TV crime shows, Mean Streets...

- "The natural basis for computing p****ing tropical years is the mean longitude of the Sun reckoned from the precessionally moving equinox (the dynamical...

- gives the Right ascension of the fictitious mean Sun, affected by aberration (which is used in finding mean solar time) as τ = 18h 38m 45.836s + 8640184...

- "true sun" pointer in addition to the mean Sun pointer likewise, to track the elliptical anomaly of the Sun (the orbit of Earth around the Sun), but there...

- the fixed stars before the mean Sun can p**** overhead again, even though it rotates only once (360°) relative to the mean Sun. Multiplying the value in...

- the region enclosed by the Moon's orbit of the Sun is a convex set. Solar System portal The geometric mean distance in the orbit (of ELP) M. Chapront-Touzé;...

- Sun-synchronous orbit might ascend across the equator twelve times a day each time at approximately 15:00 mean local time. Special cases of the Sun-synchronous...

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