A comprehensive search for sunspots without the aid of a telescope, 1981-1982
Abstract
Results are presented from a daily sunspot survey conducted in Crosby, UK between February 1, 1981 and Febrary 28, 1982. It is found that spots or spot groups as small as 0.4 arcmin can be detected without the aid of a telescope. A total of 278 spots or spot groups corresponding to 72 long-lived active regions were observed. It is shown that periods of high sunspot activity are visible to the naked eye, suggesting that ancient Chinese observations of solar activity might be accurate.
- Publication:
-
Quarterly Journal of the Royal Astronomical Society
- Pub Date:
- March 1989
- Bibcode:
- 1989QJRAS..30...59M
- Keywords:
-
- Astronomy;
- Solar Activity;
- Sunspots;
- Telescopes;
- Clouds;
- Fog;
- Haze;
- Sun;
- Solar Physics