Sunspot 1339 released this X-Class solar flare

Sunspot 1339 released this X-Class solar flare

Sunspot 1339 released this X-Class solar flare – Earth-orbiting satellites have just detected an X2-class solar flare. The source is huge sunspot AR1339 measuring some 40,000 km wide and at least twice that in length, the sprawling sunspot group is an easy target for backyard solar telescopes. Two or three of the sunspot’s dark cores are wider than Earth itself.

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