Printer Friendly
The Free Dictionary
1,083,429,093 visitors served.
?
Dictionary/
thesaurus
Medical
dictionary
Legal
dictionary
Financial
dictionary
Acronyms
 
Idioms
Encyclopedia
Wikipedia
encyclopedia
?

sunspot
(redirected from Sun spots)

   Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson 0.04 sec.

sunspot

Cooler-than-average region of gas on the Sun's surface associated with strong local magnetic activity. Sunspots appear as dark spots, but only in contrast with the surrounding photosphere, which is several thousand degrees hotter. Spots several times larger than Earth are visible to the unaided eye (viewed through a filter); very small ones are hard to see even with a telescope. They come and go as part of the solar cycle, usually in pairs or groups, and may last for months; their cause appears to be related to the magnetic field reversals that occur every 11 years. The reality of these apparent flaws in the Sun was generally accepted only c. 1611. Periods of high sunspot activity are associated on Earth with brighter auroras and interference with radio signals.



How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content.
?Page tools
Printer friendly
Cite / link
Email
Feedback
? Mentioned in ? References in periodicals archive
 
While most spas simply treat ravaged skin or knotted muscles on a topical level, The Spa at Four Seasons Hotel Westlake Village works synergistically with the California WellBeing Institute to provide guests with an understanding of what's causing wrinkles, sun spots, collagen depletion and chronic aches, then develop strategies to help repair and prevent cellular damage going forward.
The Antelope Valley Astronomy Club will discuss solar viewing and sun spots.
He claimed, falsely, to have been the "first discoverer" of sun spots "as also of all other celestial novelties.
 
Encyclopedia browser? ? Full browser
 
 
Encyclopedia
?

Disclaimer | Privacy policy | Feedback | Copyright © 2008 Farlex, Inc.
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.. Terms of Use.