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Sunspots: Difference between revisions
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[[File:Sunspots 1302 Sep 2011 by NASA.jpg|thumb|<translate><!--T:1--> Sunspots photographed September 24, 2011. Each of these spots is larger than the earth.</translate>]] | [[File:Sunspots 1302 Sep 2011 by NASA.jpg|thumb|<translate><!--T:1--> Sunspots photographed September 24, 2011. Each of these spots is larger than the earth.</translate>]] | ||
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{{Solar system}} | {{Solar system}} | ||
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One of the best known, yet most mysterious, solar phenomena is the periodic appearance of sunspots, which affect life on earth in numerous ways. Sunspots are the most easily observed solar feature and have been seen for centuries. The earliest known record of sunspots appears in the Chinese ''Book of Changes'', written prior to 800 <small>B</small>.<small>C</small>. | One of the best known, yet most mysterious, solar phenomena is the periodic appearance of sunspots, which affect life on earth in numerous ways. Sunspots are the most easily observed solar feature and have been seen for centuries. The earliest known record of sunspots appears in the Chinese ''Book of Changes'', written prior to 800 <small>B</small>.<small>C</small>. | ||