Yohkoh detected the X-rays produced by the Sun's hot outer atmosphere. During most of 1992, Yohkoh also made visible (or "white light") images of the Sun. The images listed below are in the GIF format. They are about 262 kilobytes each; image resolution is 512 pixels by 512 pixels. The white-light images are stamped with the date and time of the observation; the date stamps have been left off of the X-ray images. Use what you have learned about magnetic active regions to match the X-ray pictures with the respective simultaneous white-light images. (This activity may be more manageable if you print out all the images on individual pages, and then try to match them up. Alternatively, you can save some paper by printing out just the X-ray pictures and comparing them to the white-light images on screen.)
Here's an example -- try it out!
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