This series of pictures shows the Sun on successive days between 20th
and 25th August 2004 (with an image for 23rd missing unfortunately). I have labelled the
spots in the second image. It is interesting to see how spots can change with
time by looking at successive images. For example, spot number 10664 is barely
there on the 20th; by the 21st a spot at the western (left-hand) end is darkening. By the
24th, however, the spot at the eastern end has developed and by the 25th only this one remains.
When comparing pictures, it must be remembered that the Sun is a globe. Looking at spot 10661
in the images for the 21st and 24th, it seems that the two spots are getting closer together, but they are
not; this is an effect of perspective.
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