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The measured FWHM is 2.0 arcsec, which agrees plainly with this limitation. In future attempts I should try to get a higher magnification on the webcam so that the actual resolution can be …

The post-1720 11-year sunspotnumber cycleshad relatively small amplitudesat the beginningof the 19th and of the 20th centuries, and these small amplitude cycleshave been widely …

Alternatively, you can send payment (credit card OK) to "[email protected]" using Paypal Paypal now accepts international payments. The password is valid for all chapters. Because of the …

In principle [and with future refinement of the data acquisition] we should be able to determine polar field reversals using 10Be. The data is not quite good enough yet. Leif, 7/26/2012 …

L. Svalgaard 3 HEPL, Stanford University, Cypress Hall C3, 466 Via Ortega, Stanford, CA 94305, USA 4 e-mail: [email protected] 5 Received November 4, 2013 Accepted Jxxxxxx dd, 2014 6

Conditions: aquired in Barraba, a small town in New South Wales, Australia; no moon, passing haze and clouds Setup: Borg 100ED F6.4, DF-2 focusser, CFW-8, L (IR reject)+R+G+B filters, …

Abstract. The terrestrial ring current is an electric current flowing toroidally around the Earth, centered at the equatorial plane and at altitudes of ;10,000–60,000 km. Changes in this …

In response to questions concerning the most recent posi- tions of the various magnetic poles in the Arctic and Antarc- tic, where the Space, Telecommunications, and Radioscience …