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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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Instead, we've discovered that the most extreme space weather switches off quite suddenly at a specific point in every solar cycle.

From Science Daily ● Jul. 21, 2026

He said: "National Oceanic and Atmospheric Administration's Space Weather Prediction Centre and NASA, based on the published solar cycle 25 predictions, concluded that solar cycle 25 will be very similar to solar cycle 24."

From BBC ● Feb. 1, 2026

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

In order to make use of the solar cycle in finding the dominical letter, it is necessary to know that the first year of the Christian era began with Saturday.

From Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary" by Various

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