Skies over North America erupted this week with shimmering colors: Shades of pink, purple and green swayed across the skies in Northern as well as some Southern states. It followed two similarly ...
Activity on the sun is not constant; it varies along a cycle of about 11 years. The peak of this solar cycle — called solar maximum — is when sunspots, solar flares and coronal mass ejections (CMEs) ...
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