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单词 sunspot cycle
释义

sunspot cycle

noun Astronomy
The recurring increase and decrease in the number of sunspots over a period averaging about eleven years: typically, around the end of each sunspot cycle, the sun’s magnetic fields switch direction...
  • These events occur during the peak of the Sun's eleven-year sunspot cycle.
  • When the sun is more active at and around the sunspot cycle maximum, the solar wind tends to be stronger.
  • Between the mid-sixteenth and seventeenth centuries, the sunspot cycle shut down, reducing solar output by a mere 0.25 percent.
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更新时间:2024/9/21 18:44:58