The answer may surprise you.| spaceplace.nasa.gov
Why is the sun's atmosphere so much hotter than its surface?| spaceplace.nasa.gov
The Sun’s activity follows an 11-year cycle. Learn more about it!| spaceplace.nasa.gov
What causes this beautiful light show?| spaceplace.nasa.gov
Learn about what makes our Sun a very busy place!| spaceplace.nasa.gov