Ram Yantra : Science Awareness

Ram Yantra:
Ram Yantra, a twin instrument was used for measuring the altitude and azimuth of celestial bodies. The floor and the cylindrical wall are cut into 60 sections of 60 each. The alternate sectors are depressed to facilitate observations so that in one instrument observation could be made between 0 to 60, 120 to 180, 240 to 300 while in the other instrument, placed side by side, observation could be made between 60 to 120 , 180 to 240, 300 to 360 and so on. The height of the central pillar and inner edge of cylindrical wall. The observer places his eye on the floor in a straight line with the celestial body and the top edge of the central pillar with the altitude varying from 900 to 450 he has to move on the floor from the base of the central pillar to the edge of the cylindrical wall, When the altitude is less than 450 he has to climb the wall, To facilitate observation, an iron rod is placed between. Depending on the location of the celestial body he has to choose either of the two instruments placed side by side.
Produced by National Science Centre (National Council of Science Museum).