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Sunspot vtt
 

 

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Summary

Description
English: A sunspot is a depression on the Sun's face that is slightly cooler and less luminous than the rest of the Sun. The Sun's complex magnetic field creates this cool region by inhibiting hot material from entering the spot. Sunspots can be larger than the Earth and typically last for only a few days. This high-resolution picture also shows clearly that the Sun's face is a bubbling sea of separate cells of hot gas. These cells are known as granules. A solar granule is about 1000 kilometers across and lasts about 10 minutes. After that, many granules end up exploding. A Sunspot Up Close Credit : Vacuum Tower Telescope, NSO, NOAO.
Date 6 November 2005(2005-11-06)
Source Astronomy Picture of the Day from url=http://apod.nasa.gov/apod/ap051106.html
Author Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
Permission
(Reusing this file)

Images from NASA are usually in the public domain.

Licensing

Public domain This file is in the public domain because it was created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)

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Mime type image/jpeg
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