Solar cycle 3
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Solar cycle 3 was the third solar cycle since 1755, when recording of solar sunspot activity began. The solar cycle lasted 9.3 years, beginning in June 1775 and ending in September 1784. The maximum smoothed sunspot number (monthly number of sunspots averaged over a twelve-month period) observed during the solar cycle was 158.5, and the minimum was 9.5.
- Kane, R.P. (2002). "Some Implications Using the Group Sunspot Number Reconstruction". Solar Physics 205(2), 383-401.
- "The Sun: Did You Say the Sun Has Donuts?". Space Today Online. Retrieved 12 August 2010.
- SIDC Monthly Smoothed Sunspot Number. ""
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