solar cycle

noun

, Astronomy.

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

Example Sentences

This is also the first X-class flare of the new solar cycle, says Kathy Reeves, an astrophysicist with the Smithsonian Astrophysical Observatory.

From Popular-Science

A solar cycle is the 11-year period during which the sun’s north and south poles flip, affecting its magnetic field and solar activity.

From Popular-Science

New data and new models probably won’t be online in time for the upcoming solar storm season, but they should be in place for solar cycle 26 in the 2030s.

From Science News

Forty-nine years make a convenient luni-solar cycle, reconciling the lunar month and the tropical solar year.

From Project Gutenberg

This, as has already been explained, is the dominical or solar cycle.

From Project Gutenberg

This period is called the dominical or solar cycle, and restores the first day of the year to the same day of the week.

From Project Gutenberg

The solar cycle is a period of time after which the same days of the year recur on the same days of the week.

From Project Gutenberg

Cycles used in chronology are three: The solar cycle, the lunar cycle, and the cycle of indiction.

From Project Gutenberg