You are here

Take a photo of the experiment or the work behind it or a creative snapshot of those involved in the experiment, submit it to the Eratosthenes Photo Competition, and win a scholarship*** to attend the GEO – Academy Summer School 2024 and/or the book “Learning Astronomy through Inquiry”.

Teachers from all over the world, that register on our site, are eligible to take part in the photo contest. The deadline for submitting your photo is the 10th of April 2024 28th of April 2024. A committee of experts from Ellinogermaniki Agogi will select the winner, on the 15th of April 2024 21th of May 2024 (the results will be announced on May 22nd 2024 at 12.00 CET on our website).

The contest in 5 steps:

  1. Take your photo.
  2. Submit your data on our website (calculate the Earth's circumference).
  3. Register to the OSOS educational platform, (Click on the right side of the screen to join OSOS). If you already have an account from previous years, please log in.
  4. Join the Community of the Eratosthenes Photo Contest March 2024 Eratosthenes Photo Contest March 2024.
  5. Click on the Resources area and afterwards on: Add New Resource. Upload your photo as an educational object and state in the Title your School Name and Country (feel free to add your name too if you wish).

The theme of the contest is the Eratosthenes Experiment. Take a photo of the experiment or the work behind it or a creative snapshot.

Minimal manipulation of digital images, such as cropping, and small adjustments to brightness, color, color balance, and/or sharpness, is permitted.

Each participant teacher must submit only one photo. In another case, participation in the Photo Contest will not be accepted.

In case your photo includes images of minors, please make sure you have obtained a signed consent by their legal guardians. Each country follows its procedures on the matter, so please consult with the relevant authorities.

Only teachers* from registered schools that have submitted their data can take part. The prize*** for the Eratosthenes Experiment Photo Contest is a place in the 2024 GEO – Academy 6–day Summer School in Marathon, Greece with all the costs (traveling, accommodation, catering, and fees) covered by the relevant scholarship.


*** Due to financial rule limitations (sponsorship from EU projects), the winning prize is for EU teachers only. For teachers outside Europe, the winning prize (postal costs included) will be an astronomy book, titled "Learning Astronomy through Inquiry".

* Teachers who registered and participated in the September 2023 Eratosthenes Experiment are also eligible to join the competition by submitting one photo (that was taken either during September 2023 or March 2024).

Contest Winners




Ellinogermaniki Agogi
Research & Development Department
Dimitriou Panagea Street
GR 15351 Pallini


The Eratosthenes Experiment is endorsed by the European project GEOACADEMY




  • Dr. Angelos Lazoudis
  • Phone: +30.210.8176795
  • Email: