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Meridian telescope being used by an astronomer. This type of telescope is used to make accurate observations of the position of an object in the sky, such as a star or the Sun. Also called a transit telescope, it is restricted to observing points along the local meridian, the imaginary line in the sky passing above the telescope and through the north and south celestial poles. The Earth's rotation brings the object into view every day. Before the invention of precision clocks, this was the most accurate way of telling the time. This telescope has been used since 1926, and was made in Paris, France. Photographed in 1999 at the Astronomical Observatory of Bucharest, Romania.
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