22. Sun | Astronotes
... Sun Archive . Viewing the Partial Solar Eclipse of 20 March 2014 . All you need to know about Sunspots . Northern Lights: Coming to a Sky Near You? ...
23. The Spinning Sun
... Once you have found a set of (5-10) suitable sunspots use a graphic program to measure and record accurate x (longitude) and y (latitude) coordinates of the selected sunspots on every image (2-4 images per day) over as many days as possible as long as ...
24. http://srd.sinp.msu.ru/nymmik/models/bazilevskaya_2.pdf
... It would be e.g., "11- month smoothed daily sunspot number" or "11-point smoothed monthly averaged sunspot number". ... sunspot number W=k(10g+f) .............k is the coefficient adjusting various observation conditions. 13-month smoothed month ...
25. Sun
... Pulkovo database of sunspots magnetic fields . Measurements of sunspot magnetic field . Solar Images in HeI 1083 nm . ... Pulkovo database of sunspots magnetic fields . Measurements of sunspot magnetic field . Solar Images in HeI 1083 nm . ...
27. Phil Plait's Bad Astronomy: Mad Science
... Does the sun rotate? What are sunspots, and how do they move on the surface? ... to measure the rotation rate is to watch sunspots and see how long they take to go ...
29. Speckle interferometry of magnetic stars
... According to the current estimates, a few percent of Main Sequence B5-F5 stars reveal strong surface magnetic fields reaching the values of tens of kilogauss, which is an order of magnitude greater than the maximal magnetic field in sunspots. ...