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.
This cycle then repeats, ending when the poles are back in their initial locations. The recent reversal marks the midpoint of Solar Cycle 24, which began in 2002.
NASA video shows reversal
Earlier in December, solar physicists announced that “the sun’s north pole has already changed sign, while the South Pole [sic] is racing to catch up.”
Solar Cycle 24 has been full of surprises. It was initially predicted to reach its midpoint in 2012, but scientists revised this estimate to 2013 when 2009 was marked by “extremely low activity” that, if it continued, could have led to another Little Ice Age.
To mark the long-anticipated solar reversal, NASA has released a video simulation of the second half of Solar Cycle 23.
“A reversal of the sun’s magnetic field is, literally, a big event,” said Tony Phillips of NASA.
The solar reversal will have significant effects that reach past our own solar system, although few of them will be felt on Earth.
“At the height of each magnetic flip, the sun goes through periods of more solar activity, during which there are more sunspots, and more eruptive events such as solar flares and coronal mass ejections,” said NASA’s Karen C. Fox.
For us on Earth, these effects will mostly be limited to an increase in the breadth, frequency and visibility of the aurora borealis and aurora australis – the Northern and Southern Lights. The magnetic reversal might also lead to freak geomagnetic storms, temporarily disrupting satellite or radio signals.
“It’s not a catastrophic event,” Hoeksema said, “it’s a large scale event that has some real implications, but it’s not something we need to worry about.”
In outer space, however, the effects will be felt more strongly.
FOR ENTIRE ARTICLE CLICK LINKClick here for the Top 12 Moments in Jewish History...LET THE ADVENTURE BEGIN! »