Solar phenomena (English Wikipedia)

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

refsWebsite

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16web.archive.org

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14harvard.edu

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14doi.org

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9nasa.gov

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6semanticscholar.org

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3books.google.com

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3arxiv.org

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3nih.gov

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3ucar.edu

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3noaa.gov

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2worldcat.org

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1nationalacademies.org

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1psu.edu

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1osa-opn.org

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1abc.net.au

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1navy.mil

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1nap.edu

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1sciencedaily.com

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1handle.net

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1universetoday.com

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1montana.edu

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1cern.ch

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1ips.gov.au

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1archive.org

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1ornl.gov

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1zoominternet.net

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1springer.com

274^th place

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abc.net.au

Kruszelnicki, Karl S. (17 April 2012). "Dr Karl's Great Moments In Science: Lazy Sun is less energetic than compost". Australian Broadcasting Corporation. Retrieved 25 February 2014. Every second, the Sun burns 620 million tonnes of hydrogen...

archive.org

Kallenrode, May-Britt (2004). Space Physics: An Introduction to Plasmas and. Springer. ISBN 978-3-540-20617-0.

arxiv.org

Emilio, M.; Kuhn, J. R.; Bush, R. I.; Scholl, I. F. (2012). "Measuring the Solar Radius from Space during the 2003 and 2006 Mercury Transits". The Astrophysical Journal. 750 (2): 135. arXiv:1203.4898. Bibcode:2012ApJ...750..135E. doi:10.1088/0004-637X/750/2/135. S2CID 119255559.
Basu, S.; Antia, H. M. (2008). "Helioseismology and Solar Abundances". Physics Reports. 457 (5–6): 217–283. arXiv:0711.4590. Bibcode:2008PhR...457..217B. doi:10.1016/j.physrep.2007.12.002. S2CID 119302796.
Usoskin, Ilya G.; Solanki, Sami K.; Schüssler, Manfred; Mursula, Kalevi; Alanko, Katja (2003). "A Millennium Scale Sunspot Number Reconstruction: Evidence For an Unusually Active Sun Since the 1940s". Physical Review Letters. 91 (21): 211101. arXiv:astro-ph/0310823. Bibcode:2003PhRvL..91u1101U. doi:10.1103/PhysRevLett.91.211101. PMID 14683287. S2CID 20754479.

bldrdoc.gov

its.bldrdoc.gov

Federal Standard 1037C [2]Glossary of Telecommunications Terms], retrieved 2011 Dec 15

books.google.com

Siscoe, George L.; Schrijver, Carolus J., eds. (2010). Heliophysics : evolving solar activity and the climates of space and earth (1. publ. ed.). Cambridge: Cambridge University Press. ISBN 9780521112949. Retrieved 28 August 2014.
Simon, A. (2001). The Real Science Behind the X-Files : Microbes, meteorites, and mutants. Simon & Schuster. pp. 25–27. ISBN 978-0-684-85618-6.
National Research Council (U.S.). Task Group on Ground-based Solar Research (1998). Ground-based Solar Research: An Assessment and Strategy for the Future. Washington D.C.: National Academy Press. p. 10.

cbc.ca

"Scientists probe northern lights from all angles". CBC. 22 October 2005.

cern.ch

cds.cern.ch

Usoskin, Ilya G.; Solanki, Sami K.; Schüssler, Manfred; Mursula, Kalevi; Alanko, Katja (2003). "A Millennium Scale Sunspot Number Reconstruction: Evidence For an Unusually Active Sun Since the 1940s". Physical Review Letters. 91 (21): 211101. arXiv:astro-ph/0310823. Bibcode:2003PhRvL..91u1101U. doi:10.1103/PhysRevLett.91.211101. PMID 14683287. S2CID 20754479.

doi.org

Emilio, M.; Kuhn, J. R.; Bush, R. I.; Scholl, I. F. (2012). "Measuring the Solar Radius from Space during the 2003 and 2006 Mercury Transits". The Astrophysical Journal. 750 (2): 135. arXiv:1203.4898. Bibcode:2012ApJ...750..135E. doi:10.1088/0004-637X/750/2/135. S2CID 119255559.
Woolfson, M. (2000). "The origin and evolution of the solar system". Astronomy & Geophysics. 41 (1): 1.12 – 1.19. Bibcode:2000A&G....41a..12W. CiteSeerX 10.1.1.475.5365. doi:10.1046/j.1468-4004.2000.00012.x.
Basu, S.; Antia, H. M. (2008). "Helioseismology and Solar Abundances". Physics Reports. 457 (5–6): 217–283. arXiv:0711.4590. Bibcode:2008PhR...457..217B. doi:10.1016/j.physrep.2007.12.002. S2CID 119302796.
Connelly, James N.; Bizzarro, Martin; Krot, Alexander N.; Nordlund, Åke; Wielandt, Daniel; Ivanova, Marina A. (2 November 2012). "The Absolute Chronology and Thermal Processing of Solids in the Solar Protoplanetary Disk". Science. 338 (6107): 651–655. Bibcode:2012Sci...338..651C. doi:10.1126/science.1226919. PMID 23118187. S2CID 21965292.
Portman, D. J. (1952-03-01). "Review of Cycles in Weather and Solar Activity. by Maxwell O. Johnson". The Quarterly Review of Biology. 27 (1): 136–137. doi:10.1086/398866. JSTOR 2812845.
Kopp, G.; Lawrence, G; Rottman, G. (2005). "The Total Irradiance Monitor (TIM): Science Results". Solar Physics. 20 (1–2): 129–139. Bibcode:2005SoPh..230..129K. doi:10.1007/s11207-005-7433-9. S2CID 44013218.
Eddy, J.A. (1990). "Samuel P. Langley (1834–1906)". Journal for the History of Astronomy. 21: 111–20. Bibcode:1990JHA....21..111E. doi:10.1177/002182869002100113. S2CID 118962423. Archived from the original on May 10, 2009.
Foukal, P. V.; Mack, P. E.; Vernazza, J. E. (1977). "The effect of sunspots and faculae on the solar constant". The Astrophysical Journal. 215: 952. Bibcode:1977ApJ...215..952F. doi:10.1086/155431.
Willson RC, Gulkis S, Janssen M, Hudson HS, Chapman GA (February 1981). "Observations of Solar Irradiance Variability". Science. 211 (4483): 700–2. Bibcode:1981Sci...211..700W. doi:10.1126/science.211.4483.700. PMID 17776650.
Usoskin, Ilya G.; Solanki, Sami K.; Schüssler, Manfred; Mursula, Kalevi; Alanko, Katja (2003). "A Millennium Scale Sunspot Number Reconstruction: Evidence For an Unusually Active Sun Since the 1940s". Physical Review Letters. 91 (21): 211101. arXiv:astro-ph/0310823. Bibcode:2003PhRvL..91u1101U. doi:10.1103/PhysRevLett.91.211101. PMID 14683287. S2CID 20754479.
Feldman, U.; Landi, E.; Schwadron, N. A. (2005). "On the sources of fast and slow solar wind". Journal of Geophysical Research. 110 (A7): A07109.1–A07109.12. Bibcode:2005JGRA..110.7109F. doi:10.1029/2004JA010918.
Feldstein, Y. I. (1986). "A Quarter Century with the Auroral Oval". EOS. 67 (40): 761. Bibcode:1986EOSTr..67..761F. doi:10.1029/EO067i040p00761-02.
Hoyt, Douglas V.; Schatten, Kenneth H. (1995-09-01). "Overlooked sunspot observations by Hevelius in the early Maunder Minimum, 1653–1684". Solar Physics. 160 (2): 371–378. Bibcode:1995SoPh..160..371H. doi:10.1007/BF00732815. ISSN 1573-093X.
Burns, D.; Baldwin, J. E.; Boysen, R. C.; Haniff, C. A.; et al. (September 1997). "The surface structure and limb-darkening profile of Betelgeuse". Monthly Notices of the Royal Astronomical Society. 290 (1): L11 – L16. Bibcode:1997MNRAS.290L..11B. doi:10.1093/mnras/290.1.l11.

handle.net

hdl.handle.net

Contribution of High Charge and Energy (HZE) Ions During Solar-Particle Event of September 29, 1989 Kim, Myung-Hee Y.; Wilson, John W.; Cucinotta, Francis A.; Simonsen, Lisa C.; Atwell, William; Badavi, Francis F.; Miller, Jack, NASA Johnson Space Center; Langley Research Center, May 1999.

harvard.edu

ui.adsabs.harvard.edu

Emilio, M.; Kuhn, J. R.; Bush, R. I.; Scholl, I. F. (2012). "Measuring the Solar Radius from Space during the 2003 and 2006 Mercury Transits". The Astrophysical Journal. 750 (2): 135. arXiv:1203.4898. Bibcode:2012ApJ...750..135E. doi:10.1088/0004-637X/750/2/135. S2CID 119255559.
Woolfson, M. (2000). "The origin and evolution of the solar system". Astronomy & Geophysics. 41 (1): 1.12 – 1.19. Bibcode:2000A&G....41a..12W. CiteSeerX 10.1.1.475.5365. doi:10.1046/j.1468-4004.2000.00012.x.
Basu, S.; Antia, H. M. (2008). "Helioseismology and Solar Abundances". Physics Reports. 457 (5–6): 217–283. arXiv:0711.4590. Bibcode:2008PhR...457..217B. doi:10.1016/j.physrep.2007.12.002. S2CID 119302796.
Connelly, James N.; Bizzarro, Martin; Krot, Alexander N.; Nordlund, Åke; Wielandt, Daniel; Ivanova, Marina A. (2 November 2012). "The Absolute Chronology and Thermal Processing of Solids in the Solar Protoplanetary Disk". Science. 338 (6107): 651–655. Bibcode:2012Sci...338..651C. doi:10.1126/science.1226919. PMID 23118187. S2CID 21965292.
Kopp, G.; Lawrence, G; Rottman, G. (2005). "The Total Irradiance Monitor (TIM): Science Results". Solar Physics. 20 (1–2): 129–139. Bibcode:2005SoPh..230..129K. doi:10.1007/s11207-005-7433-9. S2CID 44013218.
Eddy, J.A. (1990). "Samuel P. Langley (1834–1906)". Journal for the History of Astronomy. 21: 111–20. Bibcode:1990JHA....21..111E. doi:10.1177/002182869002100113. S2CID 118962423. Archived from the original on May 10, 2009.
Foukal, P. V.; Mack, P. E.; Vernazza, J. E. (1977). "The effect of sunspots and faculae on the solar constant". The Astrophysical Journal. 215: 952. Bibcode:1977ApJ...215..952F. doi:10.1086/155431.
Willson RC, Gulkis S, Janssen M, Hudson HS, Chapman GA (February 1981). "Observations of Solar Irradiance Variability". Science. 211 (4483): 700–2. Bibcode:1981Sci...211..700W. doi:10.1126/science.211.4483.700. PMID 17776650.
Usoskin, Ilya G.; Solanki, Sami K.; Schüssler, Manfred; Mursula, Kalevi; Alanko, Katja (2003). "A Millennium Scale Sunspot Number Reconstruction: Evidence For an Unusually Active Sun Since the 1940s". Physical Review Letters. 91 (21): 211101. arXiv:astro-ph/0310823. Bibcode:2003PhRvL..91u1101U. doi:10.1103/PhysRevLett.91.211101. PMID 14683287. S2CID 20754479.
Feldman, U.; Landi, E.; Schwadron, N. A. (2005). "On the sources of fast and slow solar wind". Journal of Geophysical Research. 110 (A7): A07109.1–A07109.12. Bibcode:2005JGRA..110.7109F. doi:10.1029/2004JA010918.
Feldstein, Y. I. (1963). "Some problems concerning the morphology of auroras and magnetic disturbances at high latitudes". Geomagnetism and Aeronomy. 3: 183–192. Bibcode:1963Ge&Ae...3..183F.
Feldstein, Y. I. (1986). "A Quarter Century with the Auroral Oval". EOS. 67 (40): 761. Bibcode:1986EOSTr..67..761F. doi:10.1029/EO067i040p00761-02.
Hoyt, Douglas V.; Schatten, Kenneth H. (1995-09-01). "Overlooked sunspot observations by Hevelius in the early Maunder Minimum, 1653–1684". Solar Physics. 160 (2): 371–378. Bibcode:1995SoPh..160..371H. doi:10.1007/BF00732815. ISSN 1573-093X.
Burns, D.; Baldwin, J. E.; Boysen, R. C.; Haniff, C. A.; et al. (September 1997). "The surface structure and limb-darkening profile of Betelgeuse". Monthly Notices of the Royal Astronomical Society. 290 (1): L11 – L16. Bibcode:1997MNRAS.290L..11B. doi:10.1093/mnras/290.1.l11.

ips.gov.au

Kennwell, John (2014). "Naked Eye Sunspots". Bureau of Meteorology. Commonwealth of Australia. Archived from the original on 3 September 2014. Retrieved 29 August 2014.

jstor.org

Portman, D. J. (1952-03-01). "Review of Cycles in Weather and Solar Activity. by Maxwell O. Johnson". The Quarterly Review of Biology. 27 (1): 136–137. doi:10.1086/398866. JSTOR 2812845.

montana.edu

solar.physics.montana.edu

"About Filaments and Prominences". Retrieved 2010-01-02.

nap.edu

books.nap.edu

Baker, Daniel N.; et al. (2008). Severe Space Weather Events – Understanding Societal and Economic Impacts: A Workshop Report. National Academies Press. p. 77. ISBN 978-0-309-12769-1.

nasa.gov

science.nasa.gov

"How Round is the Sun?". NASA. 2 October 2008. Archived from the original on 17 September 2018. Retrieved 7 March 2011.
"First Ever STEREO Images of the Entire Sun". NASA. 6 February 2011. Archived from the original on 8 March 2011. Retrieved 7 March 2011.
[1] Archived 2021-02-24 at the Wayback Machine NASA Science
Phillips, Tony (21 Jan 2009). "Severe Space Weather—Social and Economic Impacts". NASA Science News. National Aeronautics and Space Administration. Archived from the original on 2021-06-02. Retrieved 2014-05-07.
Bell, Trudy E.; T. Phillips (6 May 2008). "A Super Solar Flare". NASA Science News. National Aeronautics and Space Administration. Retrieved 2014-05-07.

helios.gsfc.nasa.gov

Christian, Eric R. (5 March 2012). "Coronal Mass Ejections". NASA.gov. Archived from the original on 10 April 2000. Retrieved 9 July 2013.

www-istp.gsfc.nasa.gov

Nicky Fox. "Coronal Mass Ejections". Goddard Space Flight Center @ NASA. Retrieved 2011-04-06.

solarscience.msfc.nasa.gov

Suess, Steve (June 3, 1999). "Overview and Current Knowledge of the Solar Wind and the Corona". The Solar Probe. NASA/Marshall Space Flight Center. Archived from the original on June 10, 2008. Retrieved 2008-05-07.

missionscience.nasa.gov

National Aeronautics and Space Administration, Science Mission Directorate (2009). "Space Weather 101". Mission:Science. Archived from the original on 2010-02-07. Retrieved 2014-08-30.

nationalacademies.org

www8.nationalacademies.org

Giampapa, Mark S; Hill, Frank; Norton, Aimee A; Pevtsov, Alexei A. "Causes of Solar Activity" (PDF). A Science White Paper for the Heliophysics 2010 Decadal Survey: 1. Retrieved 26 August 2014.

navy.mil

aa.usno.navy.mil

"Equinoxes, Solstices, Perihelion, and Aphelion, 2000–2020". US Naval Observatory. 31 January 2008. Archived from the original on 13 October 2007. Retrieved 17 July 2009.

newscientist.com

"Earth dodges magnetic storm". New Scientist. 24 June 1989.

nih.gov

pubmed.ncbi.nlm.nih.gov

Connelly, James N.; Bizzarro, Martin; Krot, Alexander N.; Nordlund, Åke; Wielandt, Daniel; Ivanova, Marina A. (2 November 2012). "The Absolute Chronology and Thermal Processing of Solids in the Solar Protoplanetary Disk". Science. 338 (6107): 651–655. Bibcode:2012Sci...338..651C. doi:10.1126/science.1226919. PMID 23118187. S2CID 21965292.
Willson RC, Gulkis S, Janssen M, Hudson HS, Chapman GA (February 1981). "Observations of Solar Irradiance Variability". Science. 211 (4483): 700–2. Bibcode:1981Sci...211..700W. doi:10.1126/science.211.4483.700. PMID 17776650.
Usoskin, Ilya G.; Solanki, Sami K.; Schüssler, Manfred; Mursula, Kalevi; Alanko, Katja (2003). "A Millennium Scale Sunspot Number Reconstruction: Evidence For an Unusually Active Sun Since the 1940s". Physical Review Letters. 91 (21): 211101. arXiv:astro-ph/0310823. Bibcode:2003PhRvL..91u1101U. doi:10.1103/PhysRevLett.91.211101. PMID 14683287. S2CID 20754479.

noaa.gov

oar.noaa.gov

Rodney Viereck, NOAA Space Environment Center. The Sun-Climate Connection

esrl.noaa.gov

"Sunspots". NOAA. Retrieved 22 February 2013.

swpc.noaa.gov

"NOAA Space Weather Scales". NOAA Space Weather Prediction Center. 1 Mar 2005. Archived from the original on May 7, 2014. Retrieved 2014-05-07.

ornl.gov

Kappenman, John (2010). Geomagnetic Storms and Their Impacts on the U.S. Power Grid (PDF). META-R. Vol. 319. Goleta, CA: Metatech Corporation for Oak Ridge National Laboratory. OCLC 811858155. Archived from the original (PDF) on 2013-03-10.

osa-opn.org

Wilk, S. R. (2009). "The Yellow Sun Paradox". Optics & Photonics News: 12–13. Archived from the original on 2012-06-18.

psu.edu

citeseerx.ist.psu.edu

Woolfson, M. (2000). "The origin and evolution of the solar system". Astronomy & Geophysics. 41 (1): 1.12 – 1.19. Bibcode:2000A&G....41a..12W. CiteSeerX 10.1.1.475.5365. doi:10.1046/j.1468-4004.2000.00012.x.

sciencedaily.com

"Coronal Mass Ejections: Scientists Unlock the Secrets of Exploding Plasma Clouds On the Sun". Science Daily.

semanticscholar.org

api.semanticscholar.org

Emilio, M.; Kuhn, J. R.; Bush, R. I.; Scholl, I. F. (2012). "Measuring the Solar Radius from Space during the 2003 and 2006 Mercury Transits". The Astrophysical Journal. 750 (2): 135. arXiv:1203.4898. Bibcode:2012ApJ...750..135E. doi:10.1088/0004-637X/750/2/135. S2CID 119255559.
Basu, S.; Antia, H. M. (2008). "Helioseismology and Solar Abundances". Physics Reports. 457 (5–6): 217–283. arXiv:0711.4590. Bibcode:2008PhR...457..217B. doi:10.1016/j.physrep.2007.12.002. S2CID 119302796.
Connelly, James N.; Bizzarro, Martin; Krot, Alexander N.; Nordlund, Åke; Wielandt, Daniel; Ivanova, Marina A. (2 November 2012). "The Absolute Chronology and Thermal Processing of Solids in the Solar Protoplanetary Disk". Science. 338 (6107): 651–655. Bibcode:2012Sci...338..651C. doi:10.1126/science.1226919. PMID 23118187. S2CID 21965292.
Kopp, G.; Lawrence, G; Rottman, G. (2005). "The Total Irradiance Monitor (TIM): Science Results". Solar Physics. 20 (1–2): 129–139. Bibcode:2005SoPh..230..129K. doi:10.1007/s11207-005-7433-9. S2CID 44013218.
Eddy, J.A. (1990). "Samuel P. Langley (1834–1906)". Journal for the History of Astronomy. 21: 111–20. Bibcode:1990JHA....21..111E. doi:10.1177/002182869002100113. S2CID 118962423. Archived from the original on May 10, 2009.
Usoskin, Ilya G.; Solanki, Sami K.; Schüssler, Manfred; Mursula, Kalevi; Alanko, Katja (2003). "A Millennium Scale Sunspot Number Reconstruction: Evidence For an Unusually Active Sun Since the 1940s". Physical Review Letters. 91 (21): 211101. arXiv:astro-ph/0310823. Bibcode:2003PhRvL..91u1101U. doi:10.1103/PhysRevLett.91.211101. PMID 14683287. S2CID 20754479.

springer.com

link.springer.com

Hoyt, Douglas V.; Schatten, Kenneth H. (1995-09-01). "Overlooked sunspot observations by Hevelius in the early Maunder Minimum, 1653–1684". Solar Physics. 160 (2): 371–378. Bibcode:1995SoPh..160..371H. doi:10.1007/BF00732815. ISSN 1573-093X.

ucar.edu

hao.ucar.edu

Eddy, J.A. (1990). "Samuel P. Langley (1834–1906)". Journal for the History of Astronomy. 21: 111–20. Bibcode:1990JHA....21..111E. doi:10.1177/002182869002100113. S2CID 118962423. Archived from the original on May 10, 2009.
"History of Solar Physics: A Time Line of Great Moments: 0–1599". High Altitude Observatory. University Corporation for Atmospheric Research. Archived from the original on 18 August 2014. Retrieved 15 August 2014.
"History of Solar Physics: A Time Line of Great Moments: 1800–1999". High Altitude Observatory. University Corporation for Atmospheric Research. Archived from the original on 18 August 2014. Retrieved 15 August 2014.

universetoday.com

Atkinson, Nancy (August 6, 2012). "Huge Solar Filament Stretches Across the Sun". Universe Today. Retrieved August 11, 2012.

web.archive.org

"How Round is the Sun?". NASA. 2 October 2008. Archived from the original on 17 September 2018. Retrieved 7 March 2011.
"First Ever STEREO Images of the Entire Sun". NASA. 6 February 2011. Archived from the original on 8 March 2011. Retrieved 7 March 2011.
Wilk, S. R. (2009). "The Yellow Sun Paradox". Optics & Photonics News: 12–13. Archived from the original on 2012-06-18.
"Equinoxes, Solstices, Perihelion, and Aphelion, 2000–2020". US Naval Observatory. 31 January 2008. Archived from the original on 13 October 2007. Retrieved 17 July 2009.
Christian, Eric R. (5 March 2012). "Coronal Mass Ejections". NASA.gov. Archived from the original on 10 April 2000. Retrieved 9 July 2013.
[1] Archived 2021-02-24 at the Wayback Machine NASA Science
Eddy, J.A. (1990). "Samuel P. Langley (1834–1906)". Journal for the History of Astronomy. 21: 111–20. Bibcode:1990JHA....21..111E. doi:10.1177/002182869002100113. S2CID 118962423. Archived from the original on May 10, 2009.
Kennwell, John (2014). "Naked Eye Sunspots". Bureau of Meteorology. Commonwealth of Australia. Archived from the original on 3 September 2014. Retrieved 29 August 2014.
Suess, Steve (June 3, 1999). "Overview and Current Knowledge of the Solar Wind and the Corona". The Solar Probe. NASA/Marshall Space Flight Center. Archived from the original on June 10, 2008. Retrieved 2008-05-07.
Phillips, Tony (21 Jan 2009). "Severe Space Weather—Social and Economic Impacts". NASA Science News. National Aeronautics and Space Administration. Archived from the original on 2021-06-02. Retrieved 2014-05-07.
"NOAA Space Weather Scales". NOAA Space Weather Prediction Center. 1 Mar 2005. Archived from the original on May 7, 2014. Retrieved 2014-05-07.
Kappenman, John (2010). Geomagnetic Storms and Their Impacts on the U.S. Power Grid (PDF). META-R. Vol. 319. Goleta, CA: Metatech Corporation for Oak Ridge National Laboratory. OCLC 811858155. Archived from the original (PDF) on 2013-03-10.
National Aeronautics and Space Administration, Science Mission Directorate (2009). "Space Weather 101". Mission:Science. Archived from the original on 2010-02-07. Retrieved 2014-08-30.
"Astronomy: On the Sunspot Cycle". Archived from the original on February 13, 2008. Retrieved 2008-02-27.
"History of Solar Physics: A Time Line of Great Moments: 0–1599". High Altitude Observatory. University Corporation for Atmospheric Research. Archived from the original on 18 August 2014. Retrieved 15 August 2014.
"History of Solar Physics: A Time Line of Great Moments: 1800–1999". High Altitude Observatory. University Corporation for Atmospheric Research. Archived from the original on 18 August 2014. Retrieved 15 August 2014.

worldcat.org

search.worldcat.org

Kappenman, John (2010). Geomagnetic Storms and Their Impacts on the U.S. Power Grid (PDF). META-R. Vol. 319. Goleta, CA: Metatech Corporation for Oak Ridge National Laboratory. OCLC 811858155. Archived from the original (PDF) on 2013-03-10.
Hoyt, Douglas V.; Schatten, Kenneth H. (1995-09-01). "Overlooked sunspot observations by Hevelius in the early Maunder Minimum, 1653–1684". Solar Physics. 160 (2): 371–378. Bibcode:1995SoPh..160..371H. doi:10.1007/BF00732815. ISSN 1573-093X.

zoominternet.net

users.zoominternet.net

"Astronomy: On the Sunspot Cycle". Archived from the original on February 13, 2008. Retrieved 2008-02-27.