Sunspot - Wikipedia, the free encyclopedia
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A sunspot is an area on the Sun's surface (photosphere) that is marked by intense magnetic activity, which inhibits convection, forming areas of reduced surface temperature. They can be visible from...
en.wikipedia.org/wiki/Sunspot
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In 1610, shortly after viewing the sun with his new telescope, Galileo Galilei (or was it Thomas Harriot?) made the first European observations of Sunspots. ... Although the observations were not as extensive as in later years, the Sun was in fact well observed during this time and this lack of sunspots is well documented.
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solarscience.msfc.nasa.gov/SunspotCycle.shtml
solarscience.msfc.nasa.gov/SunspotCycle.shtml
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Astronomers are still learning about sunspots and about their affect on us, but believe that the spots on the sun, which were first observed through a telescope by Galileo in 1610, ... The sunspot cycle, is a recurring 11-year period over which the number of sunspots fluctuates and corresponds to the number of sun flares.
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www.coolquiz.com/trivia/explain/docs/sunspots.asp
www.coolquiz.com/trivia/explain/docs/sunspots.asp
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Ever since the official beginning of Solar Cycle 24 at the start of the year, when a sunspot pair was observed with opposite magnetic polarity to spots in the previous cycle, ... Amateur astronomers have observed the first sunspots to appear on the solar surface for weeks. This period of extreme magnetic calm has made...
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www.universetoday.com/2008/08/21/sunspot-pair-observed-...
www.universetoday.com/2008/08/21/sunspot-pair-observed-today-can-we-get-this-solar-cycle-started/
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The findings, which are to appear in the December issue of Physical Review Letters, chart sunspots back to the year 850. Sunspots were first observed in the early 17th century after the discovery of the telescope.
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www.dawn.com/2003/10/31/int20.htm
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WIRED – Two sunspots are visible on our star’s face for the first time in more than a year, ... People have been counting sunspots since Galileo first observed one in the early 17th century. Through the 28 documented cycles, stretching from 1745 to today, some variation in cycle length has been observed.
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www.dvorak.org/blog/2009/09/25/sunspots-return-after-ye...
www.dvorak.org/blog/2009/09/25/sunspots-return-after-year-absence-yayyyyy/
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The chart above is of modern sunspots. Sunspots were first observed and recorded in China during the Shang Dynasty (~1700 BC to ~1027 BC). In the I Ching, a very early observation of sunspots was recorded as "three suddenly bursting fires eating a ... The Bamboo Annals state: "During the first year of the reign of King Yi,
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hua.umf.maine.edu/China/astronomy/tianpage/0010H_sunspo...
hua.umf.maine.edu/China/astronomy/tianpage/0010H_sunspots6563w.html
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Nov 4, 2003 ... 11000 year sunspot reconstruction, with high levels over 8000 years ago ... They were first observed telescopically in late 1610 by Frisian ...
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infao5501.ag5.mpi-sb.mpg.de:8080/topx/archive?link=Wiki...
infao5501.ag5.mpi-sb.mpg.de:8080/topx/archive?link=Wikipedia-Lip6-2/27616.xml&style
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December 2009 -- Special Notice: HFRadio.org and related websites are all a service paid for by Tomas David Hood, and by the ... E#4 - Subject: No more sunspots by 2015!? It is possible, if the trend revealed in current sunspot research at Kitt Peak, AZ, continues. Listen now! . Podcast home: NW7US Podcast...
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