<Tr> <Td> </Td> <Td> Look up zenith in Wiktionary, the free dictionary . </Td> </Tr> <P> The zenith is an imaginary point directly "above" a particular location, on the imaginary celestial sphere . "Above" means in the vertical direction opposite to the apparent gravitational force at that location . The opposite direction, i.e. the direction in which gravity pulls, is toward the nadir . The zenith is the "highest" point on the celestial sphere (meaning it is the farthest up from the gravitational force). </P> <P> The word "zenith" derives from an inaccurate reading of the Arabic expression سمت الرأس (samt ar - ra's) proposed by ancient Persian astronomers, meaning "direction of the head" or "path above the head", by Medieval Latin scribes in the Middle Ages (during the 14th century), possibly through Old Spanish . It was reduced to' samt' ("direction") and miswritten as' senit' /' cenit', as the "m" was misread as an "ni". Through the Old French' cenith',' zenith' first appeared in the 17th century . </P> <P> The term zenith is sometimes used to refer to the highest point, way or level reached by a celestial body during its apparent orbit around a given point of observation . This sense of the word is often used to describe the location of the Sun ("The sun reached its zenith ..."), but to an astronomer the sun does not have its own zenith, and is at the zenith only if it is directly overhead . </P>

Where does the sun reach zenith at midday