Top: Group of sun spots and veiled spots. Observed on June 17th 1875 at 7 h. 30 m. A.M. by E.L.

Top: Group of sun spots and veiled spots. Observed on June 17th 1875 at 7 h. 30 m. A.M. by E.L. Trouvelot

Bottom: Active Region 1302 (photo by Alan Friedman), which is several times larger than the Earth

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