NASA: The sun has flipped upside down
The sun has “flipped upside down,” NASA announced at the end of December. Although the star that defines our solar system has not physically flipped, its north and south poles have reversed in a natural process marking the midpoint of what is known as the solar cycle.
According to Todd Hoeksema, director of the Wilcox Solar Observatory at Stanford University, the sun goes through a natural cycle that averages 22 years. In each half-cycle, areas of intense solar magnetic activity known as sunspots gradually move from the sun’s equatorial region toward the poles, eventually disrupting the magnetic fields at the star’s North and South. Eventually, the sun’s magnetic field shuts down entirely, then reboots with the positive and negative poles at opposite sides.
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