This full disk image of the sun is a white-light, or visible light
image. It was taken near the minimum of our current solar cycle
The square in the middle acts as a "window":
through it you can see the sun using different filters. You can
click and drag on the square to examine different parts of the sun.
The buttons at the bottom control which filter is used. Each lets
you see the sun in a different way: in x-ray, extreme ultraviolet,
h-alpha, or as a magnetogram. Use the buttons at the bottom to select
which filter you'd like to use.
Move on to mid-Cycle, between
Solar Min and Solar Max.