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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

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

The Northern Lights were seen in the UK again on Monday night following an increase in solar activity over the last few days.

From BBC Mar. 24, 2026

That and the solar activity caused high temperatures in the capsule, and he had to return early.

From "Women in Space" by Karen Bush Gibson

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