Thread: sunspot? or no sunspot?
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Old 16-07-2009, 05:59 PM
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Merlin66 (Ken)
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Join Date: Oct 2005
Location: Junortoun Vic
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The MDI image shows the visible surface features pretty well.
A sunspot can be visible for a few hours throught to a couple of weeks, sometimes even more with very large groups. They change their structure very quickly so every day is different!
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