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The Science Popularization Association of Communicators and Educators (SPACE), has organized a program on Jantar Mantar in the capital where the participants will be able to take actual measurements of circumference of the earth as done 2,300 years ago by Greek astronomer Eratosthenes using a technique involving measurements of shadows made by the sun.
The program which will be conducted between 9.30 am – 2.30 pm is part of the project “Paridhi” by SPACE. The program coincides with 21 June which is Summer Solstice, the longest day in the north hemisphere of the earth.
The project involves participants taking measurement of shadows at noon, at different places on the same longitude, such as Delhi and Bangalore.
SPACE will partner with astronomers from Kazakhstan, Nepal, Pakistan and other SAARC countries for conducting the Eratosthenes experiment.
Besides Jantar Mantar, SPACE will conduct the experiment at Bal Baharati Public School in Delhi and Gyan Shakti Vidyalaya in Noida.
Apart from the experiment, SPACE has partnered with the Archeological Survey of India to conduct a heritage walk around Jantar Mantar to show how the astronomical observatory was used for calculation of time and position of celestial bodies.