Solar cycle 8 was the eighth

solar cycle The Solar cycle, also known as the solar magnetic activity cycle, sunspot cycle, or Schwabe cycle, is a periodic 11-year change in the Sun's activity measured in terms of Modern Maximum, variations in the number of observed sunspots on the Sun ...

since 1755, when extensive recording of solar

sunspot Sunspots are temporary spots on the Sun's surface that are darker than the surrounding area. They are one of the most recognizable Solar phenomena and despite the fact that they are mostly visible in the solar photosphere they usually aff ...

activity began. The solar cycle lasted 9.7 years, beginning in November 1833 and ending in July 1843. The maximum

smoothed sunspot number The Wolf number (also known as the relative sunspot number or Zürich number) is a quantity that measures the number of sunspots and groups of sunspots present on the surface of the Sun. Historically, it was only possible to detect sunspots on t ...

observed during the solar cycle was 244.9 (March 1837), and the starting minimum was 12.2.SIDC Monthly Smoothed Sunspot Number.

Solar cycle 8 ended in 1843, the year that

Heinrich Schwabe Samuel Heinrich Schwabe (25 October 1789 – 11 April 1875) was a German amateur astronomer remembered for his work on sunspots. He observed sunspots and made drawings of them from 1825 to 1867 and suggested in 1838 that there may be a ten-year cy ...

discovered the sunspot cycle.

Claudio Vita-Finzi Claudio Vita-Finzi, (born 21 November 1936) is an Australian-British geologist and academic. He was Professor of Neotectonics at University College London from 1987 to 2001, and has been a scientific associate at the Natural History Museum, Lond ...

. ''Solar History: An Introduction'', p. 4, Springer, 2012 .

References

Solar cycles {{sun-stub

See also

References