18.10.2014 - 17:02 [ Youtube ]

Solar Cycle 24 in 2013: A Flip of the Sun‘s Magnetic Field (Science at NASA)

The entire sun‘s magnetic polarity, flips approximately every 11 years — though sometimes it takes quite a bit longer — and defines what‘s known as the solar cycle. The visualization shows how in 1997, the sun shows the positive polarity on the top, and the negative polarity on the bottom. Over the next 12 years, each set of lines is seen to creep toward the opposite pole eventually showing a complete flip. By the end of the movie, each set of lines are working their way back to show a positive polarity on the top to complete the full 22 year magnetic solar cycle.