Are there sea­sons on the Sun?

iD magazine - - Questions & Answers -

Ex­perts have now found that even on the Sun there’s some­thing com­pa­ra­ble to the sea­sons. The in­ten­sity of so­lar storms in­creases to a max­i­mum over a pe­riod of roughly eleven months and then de­creases over the course of an­other eleven months. The rea­son for this phe­nom­e­non is mag­netic fields that move to the sur­face of the Sun from its in­te­rior. Pre­vi­ously it was only known that so­lar ac­tiv­ity oc­curs in a cy­cle that pro­duces a par­tic­u­larly large num­ber of sunspots ev­ery eleven years— a mea­sure of high so­lar ac­tiv­ity. The newly dis­cov­ered two-year changes are sim­i­lar to the change be­tween rainy and dry sea­sons on Earth— just with a tem­per­a­ture of be­tween 1.8 and 18 mil­lion de­grees Fahren­heit.

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