Our sun goes through a cycle of activity every 11 years, and it may be kept consistent by a periodic alignment of Venus, Earth, and Jupiter in their orbits
Source:
https://www.newscientist.com/article/2205096-the-planets-might-control-the-suns-activity-and-its-not-astrology/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home