21 June 2008
- 21 June 2008
Eratosthenes Festivity is an annual event organized by the the Planetarium Science Center (PSC) on 21 June every year since 2003; the day of Summer Solstice in Alexandria and Aswan. Eratosthenes, the Greek scientist and the third librarian of the Ancient Library of Alexandria, was the first scientist who measure the circumference of the Erath before 2000 years ago in these two cities.
1_program_of_21-6-2008.doc