Solar storms found to "profoundly modify" the foreshock—the region that extends beyond the magnetic field.
Researchers identified unusual solar activity around 660 BC in astrological records they then matched to tree ring data.
Scientists predict current solar cycle will come to an end in the first six months of 2020.
Although the flare lasted just 10 seconds, it made the star appear about 1,000 times brighter than usual.
The sun just produced its biggest solar flare for 12 years—despite supposedly being in one of its quietest phases.
The X9.3 solar flare was the largest since 2005 when an X17 flare was recorded.