Solar cycle 21 (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Solar cycle 21" in English language version.

refsWebsite

Global rank English rank

2spaceweather.com

low place

low place

2^nd place

2^nd place

1spacetoday.org

low place

low place

low place

low place

1web.archive.org

1^st place

1^st place

75^th place

83^rd place

low place

low place

18^th place

17^th place

doi.org

Kane, R.P. (2002). "Some Implications Using the Group Sunspot Number Reconstruction". Solar Physics 205(2), 383-401.

harvard.edu

adsabs.harvard.edu

Kopp, G. (2016). "Magnitudes and timescales of total solar irradiance variability". JSWSC 6, A30.

nasa.gov

science.nasa.gov

What's Wrong with the Sun? (Nothing) more information: Spotless Days. ""NASA - What's Wrong with the Sun?". Archived from the original on 2008-07-14. Retrieved 2017-07-12."

oma.be

sidc.oma.be

SIDC Monthly Smoothed Sunspot Number. "[1]"

spacetoday.org

"The Sun: Did You Say the Sun Has Spots?". Space Today Online. Retrieved 12 August 2010.

spaceweather.com

Spotless Days. "[2]"
"The Most Powerful Solar Flares ever Recorded". spaceweather.com.

telenet.be

users.telenet.be

Solaemon's Spotless Days Page. "[3]"

web.archive.org

What's Wrong with the Sun? (Nothing) more information: Spotless Days. ""NASA - What's Wrong with the Sun?". Archived from the original on 2008-07-14. Retrieved 2017-07-12."