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 nearly periodic 11-year change in the Sun's activity measured in terms of variations in the number of observed sunspots on the Sun's surfa ...

since 1755, when extensive recording of solar

sunspot Sunspots are phenomena on the Sun's photosphere that appear as temporary spots that are darker than the surrounding areas. They are regions of reduced surface temperature caused by concentrations of magnetic flux that inhibit convection. Sun ...

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. History Astronomers have been observing the Sun recordi ...

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) a German astronomer remembered for his work on sunspots. Schwabe was born at Dessau. At first an apothecary, he turned his attention to astronomy, and in 1826 commenced his observations ...

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, Londo ...

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

References

Solar cycles {{sun-stub

See also

References