The 13th International Cosmic Day takes place today, November 26, 2024. 

We are delighted to welcome everyone interested in the fascinating world of cosmic particles. To get started, we’ve prepared a few special greetings just for you: 

International Cosmic Day (ICD) is dedicated to cosmic particles, which constantly surround us but always go unnoticed. So let's spend a day exploring the world of particles coming from outer space and discovering what secrets they hold.

On this day, students, teachers and scientists around the world will come together to talk and learn about cosmic particles. Questions that can be discussed are:

• What are cosmic particles?
• Where do they come from?
• How can they be measured and what can we learn from them?

Curious about what the ICD is all about? Watch these two videos about the ICD's 10th anniversary and a behind-the-scenes look at how the ICD is organized.

If you want to participate, please register under Registration. In case you have any questions, write us an e-mail at icd@desy.de.

The International Cosmic Day is organized by DESY, IPPOG and many national networks and partners.