File:Full disk view of the Sun in 171 Å ultraviolet light (captured by STEREO-B, 2007-04-08).ogv

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Description Image sequences taken April 8-9, 2007 by the EUVI telescopes on the two STEREO spacecraft (STEREO-B, left eye; STEREO-A, right eye). This sequence comes from STEREO-B. At this time the spacecraft were about 3.7 degrees apart. These images show the Sun in extreme ultraviolet light at a wavelength of 171 Å, highlighting parts of the Sun's atmosphere (the corona) at about one million degrees C. Note the bright active regions near the Sun's equator and the dark "coronal holes" at the north and south poles. These are features of the Sun's magnetic field. Coronal holes are areas where the magnetic field opens out to allow material to flow out into the solar system, while active regions are made up of strong, closed fields which bottle up hot plasma (ionized gas) close to the surface. This image was taken near the minimum in solar activity, so there are few active regions.
Date between 8 April 2007 and 9 April 2007
date QS:P,+2007-04-00T00:00:00Z/10,P1319,+2007-04-08T00:00:00Z/11,P1326,+2007-04-09T00:00:00Z/11
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Author NASA/Jet Propulsion Laboratory and NASA/Goddard Space Flight Center Scientific Visualization Studio
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Public domain This file is in the public domain in the United States because it was solely 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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current00:48, 26 March 201136 s, 1,080 × 1,080 (8.64 MB)Tryphon (talk | contribs){{Information |Description=Image sequences taken April 8-9, 2007 by the EUVI telescopes on the two en:STEREO spacecraft (STEREO-B, left eye; STEREO-A, right eye). This sequence comes from STEREO-B. At this time the spacecraft were about 3.7 degrees

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