Fusion Energy Week Logo

Fusion Energy Week
May 4  –10, 2026

Conceptual illustration depicting the global connections related to fusion
Illustration by Thumỹ Phan for U.S. Fusion Outreach

Fusion Energy Week

Fusion energy powers the sun and stars. We are closer than ever to harnessing this type of clean energy here on earth. Dr. Cecilia Payne-Gaposchkin discovered what our sun and stars are made of, which led to our understanding of fusion. In honor of Dr. Payne-Gaposchkin’s birthday on May 10th, Fusion Energy Week will be held annually in the second week of May.

Amazing things are happening right now in fusion energy science and technology. Fusion energy has never been closer to appearing on the electrical grid, which has the potential to completely transform the global energy market. In the collaborative world of modern science, we all have an opportunity to not only watch this amazing transformation happen, but to be a part of it!

Fusion Energy Week will connect the public with those currently working in fusion energy around the world at laboratories, universities and companies who support this pursuit of a clean, safe, and robust energy alternative. Join us for a series of events during the week of May 4–10th when we will come together to celebrate the science and technology that will make fusion the energy solution of tomorrow.

To learn more about fusion energy, visit usfusionenergy.org or attend one of the many fusion events listed below! If you would like to host your own Fusion Energy Week event, please contact us using the “Submit an Event” button. 

Submit an Event 2025 Events 2024 Events

Interested in hosting an event but want to learn more? Use the above link to submit your questions and we will get back to you!

Further information on hosting an event can be found on our event resources page, alongside downloadable content to assist with advertising and messaging.

Cecilia Payne Illustration

Illustration by Thumỹ Phan 
for U.S. Fusion Outreach

Cecilia Payne

What are stars made of? How do stars make their energy? We know the answers to these questions thanks to Dr. Cecilia Payne-Gaposchkin, who discovered that the stars, like our Sun, are mostly made of hydrogen and helium. This led to our understanding of fusion—the reaction that powers our sun and the stars. These elements are the “fuel” that powers fusion reactions inside the sun in a giant fusion engine. Together, we are working to build fusion engines here on Earth. Join the celebration and join the movement to bring the power of the stars to Earth.