sunspot


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Related to sunspot: Sunspot cycle

sunspot

Dermatology
(1) Actinic keratosis, see there.
(2) Actinic lentigo, see there.
 
Meteorology
A region of intense magnetic activity on the sun’s surface resulting in a local reduction in convection and temperature, which appears are dark spots.
References in periodicals archive ?
Therefore, it is important to review the sunspot series in the last centuries as a manner to evaluate changes in the Sun.
An almost continuous line of CaK plage was observed for about 60[degrees] east-west at a latitude between S05[degrees] and S10[degrees] from Aug 17 to 20, linking plage around the sunspot groups in that region.
The transit will be particularly exciting if lots of sunspots are visible at the same time.
The enormous magnetic field of the sun dictates the solar cycle, which includes sunspots, solar wind and ejection of fast-moving particles that sometimes hit Earth.
Many climate scientists agree that sunspots and solar wind could be playing a role in climate change, but the vast majority view it as very minimal and attribute Earth's warming primarily to emissions from industrial activity--and they have thousands of peer-reviewed studies available to back up that claim.
The SUNSpot also has a built-in recognition light function in the lamp, which we think is a terrific idea.
'Sunspot activity varies cyclically but the length of the cycle itself can vary.
ANSWER: Before the greenhouse effect became a concern, people used to blame sunspots for unusual weather.
The German-Finnish research team has now applied a new method to obtain insight into the development of the sunspot number from before the beginning of direct records.
Despite $850,000 in financing raised over three rounds, the last SUNSPOT QuickGreen Cuisine closed in December 1996.
This is in marked contrast to the past 100 years, which saw rising numbers of solar flares, sunspots and geomagnetic storms.