sunspots
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The number of sunspots goes through a maximum and minimum about every eleven years. During periods of maximum sunspots, the elementary particles associated with the spots cause disturbances in the atmosphere of the Earth and interfere with radio and television communication.
Example Sentences
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Although the Sun is constantly active, much of its surface lacks prominent features such as sunspots.
From Science Daily ● Oct. 24, 2026
Astronomers have tracked sunspots for centuries, but every solar cycle behaves differently.
From Science Daily ● Jul. 21, 2026
During that time, its magnetic field reverses polarity, while the number of visible sunspots increases and then declines.
From Science Daily ● Jul. 21, 2026
The Sun has an 11-year cycle, ranging from periods with few sunspots and low activity, to times with many sunspots that produce increased activity and energy.
From BBC ● Dec. 28, 2025
First, in a rather over-generous preface, the Lynceans gave Galileo credit for discovering sunspots.
From "The Scientists" by John Gribbin
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