July 8, 2009 For Daily Musings sign up for the Almanac Newsletter Email Address Learn about the discovery of the eleven-year solar cycle, and it’s importance in predicting the frequency of sun spots and the strength of solar storms. Credit: NASA Astronomy Sun ADVERTISEMENT More Like This Top 5 Sun Discoveries #2: The Heliosphere What is the Solar Cycle and How Long Does It Last? The Glow of Space Weather Top 5 Sun Discoveries #5: The Dynamic Sun Friday the 13th and the Not-So-Scary Space Storms Solar Cycle 25 Predictions Get Almanac’s Daily Updates Free Email Newsletter Email Address BONUS: You’ll also receive our free Beginner Gardening Guide! ADVERTISEMENT Add a Comment Advertisement