Cannabaceae

Solar cycle 2
Drawing of a sunspot from 1774, illustrating the Wilson effect
Sunspot data
Start dateJune 1766
End dateJune 1775
Duration (years)9
Max count193.0
Max count monthSeptember 1769
Min count18.6
Cycle chronology
Previous cycleSolar cycle 1 (1755–1766)
Next cycleSolar cycle 3 (1775–1784)

Solar cycle 2 was the second solar cycle since 1755, when extensive recording of sunspot activity began.[1][2] The solar cycle lasted 9 years, beginning in June 1766 and ending in June 1775. The maximum smoothed sunspot number observed during the solar cycle was 193.0 (September 1769), and the starting minimum was 18.6.[3]

Sunspot observations by Alexander Wilson during this period established the Wilson effect.

See also[edit]

References[edit]

  1. ^ Kane, R.P. (2002), "Some Implications Using the Group Sunspot Number Reconstruction", Solar Physics, 205 (2): 383–401, Bibcode:2002SoPh..205..383K, doi:10.1023/A:1014296529097
  2. ^ "The Sun: Did You Say the Sun Has Spots?". Space Today Online. Retrieved 12 August 2010.
  3. ^ "SIDC Monthly Smoothed Sunspot Number".

One thought on “Cannabaceae

  1. Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
    View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction

Leave a Reply