Caption: 
An international team of astronomers devised a new way to look at historical solar data and reconstruct the Sun’s polar magnetic behavior across more than 100 years, with the goal of predicting the activity of future solar cycles. By merging historic and modern solar observations, SwRI and KoSO scientists reconstructed the Sun’s polar magnetic field back to the early 20th century, opening a new window into understanding long-term solar behavior to ultimately help future space-weather predictions.