Nearly 140 years have elapsed since the German apothecary and amateur astronomer Samuel Heinrich Schwabe reported discovery of the solar cycle. “From my earlier observations,” Schwabe wrote in 1843, “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.” Schwabe had been looking for new planets crossing the Sun's disk. The day‐to‐day records of sunspots he kept for 18 years as part of that search led him to realize that solar behavior is cyclic.
REFERENCES
1.
R. Howard, ed., Solar Magnetic Fields, I.A.U. Symp. No. 43, Reidel, Dordrecht (1970).
2.
C. Zwaan, in The Sun as a Star, S. Jordan, ed., NASA SP‐450, (1981), page 163.
3.
V. Bumba and J. Kleczek, eds., Basic Mechanisms of Solar Activity, I.A.U. Symp. No. 71, Reidel, Dordrecht (1976).
4.
H. K. Moffatt, Magnetic Field Generation in Electrically Conducting Fluids, Cambridge U.P., Cambridge (1978).
5.
E. N. Parker, Cosmic Magnetic Fields: Their Origin and Their Activity, Clarendon, Oxford (1979).
6.
7.
D. Gough, in Proc. Workshop on Variations of the Solar Constant, S. Sofia, ed., NASA Conf. Pub. 2191 (1981), page 185.
8.
P. Gilman, in The Sun as a Star, S. Jordan, ed., NASA SP‐450 (1981), page 231.
9.
D. Gough in Deuxieme Assemblee Europeene de Physique Solaire, Toulouse 9–10 Mars, 1978b (1978), page 81.
10.
11.
L. A. Fisk, in Space Plasma Physics, Part 1: Solar System Magnetohydronamics, Space Science Board, Nat. Acad. Sci. (1979), page 127.
12.
P. E.
Damon
, J. C.
Lerman
, A.
Long
, Ann. Rev. Earth Planet Sci.
6
, 457
(1978
).13.
14.
J. A. Eddy, in The New Solar Physics, J. A. Eddy, ed., Westview, Boulder, Colo. (1978), page 11.
15.
16.
T. S. Mast, R. A. Muller, P. P. Tans, in Proc. Conf. Ancient Sun, R. O. Pepin, J. A. Eddy, R. B. Merrill, eds., Pergamon, New York (1980), page 191.
17.
G. M. Raisbeck, F. Yiou, in Proc. Conf. Ancient Sun, R. O. Pepin, J. A. Eddy, R. B. Merrill, eds., Pergamon, New York (1980), page 183.
18.
H. A. Hill, in The New Solar Physics, J. A. Eddy, ed., Westview, Boulder (1981), page 135.
19.
M. Stix, P. A. Gilman, eds., Large Scale Velocity Fields on the Sun, Joint Discussion No. 1, I.A.U. Trans. XVII B, Reidel, Dordrecht (1979).
20.
E. J. Rhodes, R. K. Ulrich, J. W. Harvey, T. L. Duvall, in Solar Instrumentation: What's Next? R. B. Dunn, ed., Sacramento Peak Nat. Observatory (1981), page 7.
21.
H. A. Hill, W. A. Dzienbowski, eds., Nonradial and Nonlinear Stellar Pulsations, Springer‐Verlag, Berlin (1980).
22.
F. L. Deubner, in The Sun as a Star, S. Jordan, ed., NASA SP‐450 (1981), page 65.
23.
O. R. White, ed., The Solar Output and its Variations, Colorado Assoc. U.P. (1977).
24.
R. M. Bonnet, A. K. Dupree, eds., Solar Phenomena in Stars and Stellar Systems, Reidel, Dordrecht (1981).
This content is only available via PDF.
© 1982 American Institute of Physics.
1982
American Institute of Physics
You do not currently have access to this content.
