• Sunspot - Wikipedia, the free encyclopedia

    en.wikipedia.org/wiki/Sunspot Sunspot activity cycles about every eleven years. The point of highest sunspot activity during a cycle is known as solar maximum, and the point of lowest activity as ...
  • Sunspots

    sohowww.nascom.nasa.gov/sunspots 04 February 2016 - Mission Day: 7370 - DOY: 035. About us home: about: gallery: data/archive: operations: publications
  • sunspot cycle - NASA/Marshall Solar Physics

    solarscience.msfc.nasa.gov/SunspotCycle.shtml Sunspot Cycle Predictions: Click on image for larger version. ... Although sunspots themselves produce only minor effects on solar emissions, ...
    • The Galileo Project | Science | Sunspots

      galileo.rice.edu/sci/observations/sunspots.html Sunspots. Sunspots are dark areas of irregular shape on the surface of the Sun. Their short-term and long-term cyclical nature has been established in ...
    • SpaceWeather.com: The Sunspot Number

      spaceweather.com/glossary/sunspotnumber.html The Sunspot Number. Scientists track solar cycles by counting sunspots -- cool planet-sized areas on the Sun where intense magnetic loops ...
    • NASA's Cosmicopia - Sun - Solar Activity - Sunspots

      helios.gsfc.nasa.gov/sspot.html The electric currents in the Sun, as well as in planets and galaxies, generate magnetic fields. Sunspots, temporary disturbances in the Sun's photosphere, are the ...
    • Sunspots - Windows to the Universe

      www.windows2universe.org/sun/atmosphere/sunspots.html Sunspots are dark, planet-sized regions that appear on the "surface" of the Sun. Sunspots are "dark" because they are colder than the areas around them.