(Files in red–history)
16. The Sun
16H. Schwabe, 1843
16a. Schwabe paper
16b. Carrington, 1859
17. The Corona
18. Solar Wind
18A. Interplan. Field
18H.Solar Wind obs.
Excerpts from Solar Observations During 1843 by Heinrich Schwabe, (Astronomische Nachrichten, vol. 20., no. 495, 1843)The weather throughout this year was so extremely favorable that I have been able to observe the Sun clearly on 312 days; however, I counted only 34 groups of sunspots....
From my earlier observations, which I have reported every year in this journal, it appears that there is a certain periodicity in the appearance of sunspots and this theory seems more and more probable from the results of this year. ...I should like now to add a complete report of all my observations of sunspots up to the present, in which I have indicated the number of days of observation and the days when there were no spots to be seen, as well as the number of groups.
|Year||No. of Clusters||Days when no |
Spots were observed
You can also find on the web a biography of Schwabe by the High Altitude Observatory in Boulder, Colorado.
Author and Curator: Dr. David P. Stern
Mail to Dr.Stern: education("at" symbol)phy6.org
Co-author: Dr. Mauricio Peredo
Spanish translation by J. Méndez