The 8th International Cosmic Day took place on 6 November 2019.

We received greetings from Italy! Prof. Giovanni Losurdo from INFN Pisa had a video message for all the participating groups:

International Cosmic Day will also be celebrated in Italy. ⓒ EEE

The International Cosmic Day brings students, teachers and scientists together to talk and learn about Cosmic Rays.

  • What are cosmic particles?
  • Where do they come from?
  • How can they be measured?

During the International Cosmic Day (ICD) you will find answers to these questions. But furthermore, you will carry out your own measurements and get in contact with groups all over the world to compare and discuss your results. You will work like a real scientist in an international collaboration.

Also have a look at our contribution to the 35th International Cosmic Ray Conference (Poster (PDF, 1.3 MB), Proceeding (PDF, 3.3 MB)).

Are you interested? Then participate this year!


The 8th International Cosmic Day was organized by DESY together with Netzwerk Teilchenwelt, IPPOG, QuarkNet and Fermilab.

For more information please contact icd@desy.de.