Example image of eyePlorer eyePlorer map for 'Solar variation': Sunlight Periodic function Solar cycle Proxy (climate) Climate change Sunspot Watt Maunder Minimum Astronomy Telescope Joseph Henry Princeton University Stephen Alexander (astronomer) Thermopile Facula Charles Greeley Abbot Smithsonian Astrophysical Observatory Calama, Chile Mount Wilson Observatory Dendrochronology Climate Weather William Herschel Climate model Satellite Photosphere 1978 1980 February 14 October 25 Solar Maximum Mission Solar and Heliospheric Observatory Proxy (statistics) Environmental radioactivity Wolf number Finland University of Oulu Carbon-14 Heinrich Schwabe Babcock Model Magnetic field Solar luminosity George Ellery Hale Permian Holocene Little Ice Age 1948 B-29 Lake Mead crash Dalton Minimum List of solar cycles Valentin Danilov