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Topic starter
Posted : 21/09/2014 2:41 pm
Interesting article, Brian - and the animation is particularly good. It seems to also show how the polarity of the sun 'flips' every 11 years - which I've never really understood.
Posted : 22/09/2014 1:35 pm
Topic starter
Yes I thought it was very good.
Posted : 22/09/2014 2:24 pm
