A sunspot bino challenge
Have sunspots been observed on other stars?
Corrected sunspot history suggests climate change since the Industrial Revolution not due to natural solar trends
Astronomy tests Daystar’s Quark
A 12th-century sunspot enigma
How to Safely Observe the Sun
Solving sunspot mysteries
Why do sunspots appear in groups?
Astrophotography, Human Spaceflight, Observing Basics, Robotic Spaceflight, Stars, Telescopes and Equipment, The Sun