Here are 12 X-ray pictures of the Sun. The first picture (left) was
taken in 1991, just after the
last maximum of solar activity cycle. The last picture was taken
in 1995, at solar minimum.
Now that you know how the face of the Sun changes during its activity
cycle, can you guess roughly when the images shown below were taken?
The answers are...
March 1993 March 1995
