So who was it that was tracking the sun's magnetic shifts in the 17th century?
Didn`t you know that Japanese emperor-gods lived on the sun?
They know all this stuff thousands of years ago coz they been there, done that.
``According to mythology, Japan’s first Emperor Jimmu, a descendant of the Sun Goddess Amaterasu, was enthroned in the year 660 BC. ``
www.japan-guide.com/e/e2135.html