[SFDXA] Explore sunspot counts all the way back to the 18th century.

Bill bmarx at bellsouth.net
Wed Jul 15 08:32:11 EDT 2020


This interesting portion in the Space Weather News seemed to get lost. 
So I am posting it again more clearly.
*
**A new interactive tool from NOAA allows you to explore sunspot counts 
all the way back to the 18th century.*

https://www.swpc.noaa.gov/products/solar-cycle-progression



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