In section 9. The Sun
Is there a planetary influence on solar activity?
It has long been debated if the planets could have an effect on solar activity. In this study the authors present a new approach in which planetary forcing is not driving the solar activity directly, but can modulate the 11-year cycle of the Sun on longer timescales. This proposal is supported by the excellent agreement of the tidal torque through the planet and proxies for solar activity during the past 10.000 years.