Positional Astronomy and Jantar Mantar Observatory 6.wmv

Описание: Lecture on positional astronomy and the Jantar Mantar Observatory, as part of the summer online lectures in Astronomy, organised by the Nehru Planetarium, Nehru Memorial Museum and Library. Speaker : Dr. N. Rathnasree, Director, Nehru Planetarium, New Delhi. A discussion on the reason for the equation of time to arise related to time measurements with sundials.