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active sun

American  

noun

Astronomy.

  1. the sun at a maximum of solar activity, occurring every 11 years.

  2. solar activity, superimposed on an unchanging background.

Etymology

Origin of active sun

First recorded in 1975–80

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.

Why should I sit at home and mope, I thought; it was better to be active: sun and wind were full of healing.

From A Crystal Age by Hudson, W. H. (William Henry)

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.