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Solar physics

The planetary hypothesis revived

The Sun's magnetic activity varies cyclically over a period of about 11 years. An analysis of a new, temporally extended proxy record of this activity hints at a possible planetary influence on the amplitude of the cycle.

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Figure 1: The sunspot cycle.

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Correspondence to Paul Charbonneau.

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Charbonneau, P. The planetary hypothesis revived. Nature 493, 613–614 (2013). https://doi.org/10.1038/493613a

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