The Heliophysics Big Year
The Heliophysics Big Year is a global celebration of the Sun’s influence on Earth and the entire solar system. From Oct. 14, 2023, to Dec. 24, 2024, we are challenging you to participate in as many Sun-related activities as you can!
A Big Year for Our Sun
During the Heliophysics Big Year, we are challenging you to participate in as many Sun-related activities as you can!
Whether it's watching a solar eclipse, experiencing an aurora, participating in citizen science projects, or hosting a Sun party, we've got a year full of ways to celebrate the Sun!
Learn more from Nicky Fox, associate administrator of NASA’s Science Mission Directorate at NASA Headquarters.
Highlights of the Big Year
Annular Eclipse
On Oct. 14, 2023, an annular eclipse was visible from parts of the western United States.
Parker Solar Probe's Closest Approach
On Dec. 24, 2024, a record-breaking NASA mission will make its closest approach of the Sun.
Monthly Themes
Total Solar Eclipse
April 2024
On April 8, millions saw a total solar eclipse as the Moon's shadow crossed North America. A total solar eclipse is when the Moon passes in front of the Sun, revealing the Sun's wispy white outer atmosphere — the corona.
Learn More About the Eclipse
Total Solar Eclipse
April 2024
Both in and out of doors, there are so many ways to experience our closest star.
Go outside and make eclipse chalk art!
If you live at high (or low) latitudes, learn how to see the aurora
Build a solar-powered car
Make a UV bead bracelet
Bake a Sun pie
Play Snap it! An Eclipse Photo Adventure
Host a Sun Party!
Total Solar Eclipse
April 2024
Didn't get to see the total solar eclipse? Watch NASA's broadcast of this celestial event, with telescope views from across the path and special guests.
Watch the Broadcast
