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solar activity

American  

noun

Astronomy.
  1. the sum of all variable and short-lived disturbances on the sun, as sunspots, prominences, and solar flares.


Example Sentences

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The Swift observatory is falling because increased solar activity has pushed out the Earth's atmosphere such that it touches Swift.

From BBC Jul. 3, 2026

Using this method, they identified a solar proton event that likely occurred sometime between the winter of 1200 CE and the spring of 1201 CE, a period marked by unusually intense solar activity.

From Science Daily May 14, 2026

The research helps fill important gaps in the history of solar activity and improves scientists' understanding of dangerous space weather events.

From Science Daily May 14, 2026

Powerful solar activity can create stunning auroras on Earth, but outside the protection of our planet's magnetic field, the Sun can become extremely dangerous.

From Science Daily May 14, 2026

His launch had been delayed due to various technical problems and high solar activity.

From "Women in Space" by Karen Bush Gibson

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