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Jantar Mantar: Tourists visit Jantar Mantar, a collection of architectural astronomical instruments, in Jaipur, capital of India's desert state of Rajasthan January 12, 2009. The name Jantar Mantar is derived from instrument for formula on context calculation as this observatory consists of fourteen major geometric devices for measuring time, predicting eclipses, tracking stars in their orbits, ascertaining the declinations of planets, and determining the celestial altitudes and related ephemeredes. (Photo by Vijay Mathur/Reuters)
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