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solar cycle

American  

noun

Astronomy.
  1. the variation of sunspots, prominences, flares, and other solar activity through an 11-year cycle.


Example Sentences

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Although we are now past the peak of the current solar cycle and heading towards "solar minimum", expected around 2031-32, solar activity will remain relatively high through 2026.

From BBC Dec. 28, 2025

Scientists have found that the Sun's total energy output changes very little, varying by only about 0.06% over the solar cycle.

From Science Daily Dec. 3, 2025

By improving knowledge of the solar dynamo, the mission could lead to more accurate predictions of the solar cycle and, in turn, more reliable space weather forecasts.

From Science Daily Oct. 14, 2025

The Sun is currently at a "maximum" in its 11-year solar cycle.

From BBC Mar. 26, 2025

It was a cycle of 532 years, i.e. the lunar cycle of 19 × the solar cycle of 28.978.Cf. p.

From Bede's Ecclesiastical History of England by Cuthbert Bede

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