A CARRINGTON-CLASS SUNSPOT May 9th
A CARRINGTON-CLASS SUNSPOT: Sunspot AR3664 has grown so large, it now rivals the great Carrington sunspot of 1859. To illustrate their similarity, we’ve added Carrington’s famous sketch (to scale) to a NASA photo of today’s sun: Sprawling almost 200,000 km from end to end, AR3664 is 15 times wider than Earth. You can see it through …