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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

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The magnetic fields at the poles are vital to the Sun's global dynamo process and may act as "seed fields" that shape the next solar cycle, defining the overall solar magnetic structure.

From Science Daily • Oct. 14, 2025

I’ve been in Minnesota for almost one complete solar cycle.

From Slate • Oct. 16, 2024

It’s the biggest flare of this 11-year solar cycle, which is approaching its peak, according to NOAA.

From Seattle Times • May 14, 2024

This is because in the Sun's 11 year solar cycle, we are approaching the 'solar maximum', where there are naturally more sunspots on the Sun's surface.

From BBC • May 11, 2024

To the deities of the solar cycle belonged the great gods of Thebes and Heliopolis.

From Bulfinch's Mythology: the Age of Fable by Bulfinch, Thomas

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