March 8, 2020: A new sunspot is emerging in the sun’s southern hemisphere, and it looks like a member of new Solar Cycle 25. Numbered “AR2758,” the sunspot is inset in this magnetic map of the sun’s surface from NASA’s Solar Dynamics Observatory: How do we know this sunspot belongs to Solar Cycle 25? Its … Continue reading A “Radio-Active” Sunspot from the Next Solar Cycle