Orpington Astronomical Society

Astronomy => Alerts! Questions? Discussions... => Topic started by: Sue on Nov 07, 2011, 05:59:47

Title: Sunspot counting methods present versus past
Post by: Sue on Nov 07, 2011, 05:59:47

You may be interested in this site. Daily comparison of solar activity by counting sunspots using a method devised so as to be directly comparible with past data collected pre satellites age. This gives a fair opportunity to see how the cycle 24 is progressing against previous cycles.


http://www.landscheidt.info/?q=node/50