Images/videos may be used by the media and the public for educational and informational purposes only

Sunspot History

sunspot-history.jpg

Sunspot history Image Courtesy of NASA/SDO/SwRI A team led by SwRI integrated a sunspot drawing made by Hevelius in 1644 (top) with images from NASA’s Solar Dynamics Observatory to illustrate how widely varying telescopes and observation techniques can affect data. The team integrated data from 700 observations to assess the reliability of historical data, to better understand the history of solar activity.