The Astronomical Observatories of Jai Singh c5.69

c5.69

But seeing that in many cases it is necessary to determine past or future phenomena; and also that in the instant of their occurrence cloud or rain may prevent the observation—or the power and opportunity of access to an observatory may be wanting—he deemed it necessary that a table be constructed by means of which the daily places of the stars being calculated every year and disposed in a calendar may always be in readiness.