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Galileo was among the first to observe these dark solar areas that appear in 11-year cycles |
sunspots
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$800 |
J |
IN THE SCIENCE DICTIONARY |
2022-10-28 |
#8730 |
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(Kelly of the Clue Crew presents the clue.) Because of the intense magnetic fields that block heat from the core, these solar phenomena can be thousands of degrees cooler than the surrounding surface |
sunspots
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$1,200 |
DJ |
SCIENCE |
2009-02-25 |
#5638 |
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Solar flares are associated with these dark areas that peak about every 11 years |
Sunspots
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$100 |
J |
SCIENCE CLASS |
2001-04-11 |
#3833 |
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The number of these dark patches visible on the sun's surface varies from a few to several hundred |
Sunspots
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$300 |
J |
SCIENCE |
1997-03-19 |
#2898 |