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Mystery of the solar cycle solved - Techzle

Mystery of the solar cycle solved

By Ashton Edwards
ScienceAstronomy
suns, solar system

Variable sun: images of the European space telescope SOHO in the extreme ultraviolet range over two activity cycles.
© ESA, NASA

The number of sunspots is at its greatest every 10.4 years. Researchers have now been able to prove this for the first time over a millennium - and finally clarify the cause.

by THOMAS BÜHRKE

In 1829, Samuel Heinrich Schwabe sold his pharmacy in Dessau. He didn't

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