This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
The Solar Cycle XRay hi. en solar cycle montage of ten years' worth of Yohkoh SXT images demonstrating the variation in solar activity during sunspot cycle from after August to September url physics montana edu David Chenette at Lockheed Martin Advanced Technology Center David Chenette Joseph Gurman Loren Acton sent an email