The ancestry of solar-terrestrial research
Article first published online: 3 JUN 2011
©1974. American Geophysical Union. All Rights Reserved.
Eos, Transactions American Geophysical Union
Volume 55, Issue 11, pages 955–957, November 1974
How to Cite
1974), The ancestry of solar-terrestrial research, Eos Trans. AGU, 55(11), 955–957, doi:10.1029/EO055i011p00955.(
- Issue published online: 3 JUN 2011
- Article first published online: 3 JUN 2011
Since time immemorial, for superstitious, fallacious, or even scientific reasons, man has debated the nature of the control exercised over his destiny by the sun. But the first step in the long and turbulent history of research in the field of solar-terrestrial relationships was the discovery of sunspots by Galileo in 1610 (Figure 1). Since then, many specious claims have been made concerning correlations of phenomena on earth with these first recognized distinctive solar features.
It was apparent from the earliest observations that the number of visible sunspots varied with time. But it is interesting that the first long-term survey of these variations was not undertaken until more than two centuries later.