Eratos Library

From 2005 to  2016:

348 schools from 48 countries exchanged 2123 measurements and 11 784 photographies 






List of all the schools

For the "Earth Day 2015" , on april 22nd, 14 schools from 9 countries (and 5 continents) celebrated the 10th anniversary of the Eratosthenes project on eTwinning, by a videoconference meeting.

They exchanged their measurements and calculations of the circumference of the Earth and presented their school and their country.

Congratulations to the 47 partner schools, their teachers and students for their participation to the Eratosthenes march equinox experiment.








 With french and english subtitles. You can find the texts in the file archive

Eratos Twinspaces


Eratosthenes 2016


Eratosthenes 2015

Eratosthenes 2014

Eratos XIII

Eratosthenes 2012

Eratosthenes 2011

Eratosthenes measurements2010




The links to the twinspaces before 2010 are no longer available


2009 International Year of Astronomy

Forum Eratosthenes

Measuring the Circumference of the Earth

Bibliotheca Eratosthenes 



File archive

Folder Number of folders # of Documents  
Sub titles - (video le calcul d Eratosthène) 0 4
Showing 1 result.