This map of the full sun on 14 October 2012 was created by spacecraft images from, in order from left to right,­ <a href="https://en.wikipedia.org/wiki/STEREO" class="extiw" title="w:STEREO">STEREO-A</a>, <a href="https://en.wikipedia.org/wiki/STEREO" class="extiw" title="w:STEREO">STEREO-B</a> and the <a href="https://en.wikipedia.org/wiki/Solar_Dynamics_Observatory" class="extiw" title="w:Solar Dynamics Observatory">Solar Dynamics Observatory</a><br>
The dark vertical line near the centre of the picture is an overhead view of a solar prominence (see <a href="//commons.wikimedia.org/wiki/File:STEREO_view_of_solar_prominence_on_2012-10-14.jpg" title="File:STEREO view of solar prominence on 2012-10-14.jpg">File:STEREO view of solar prominence on 2012-10-14.jpg</a> for explanation).
NASA/STEREO/SDO/GSFC
<a rel="nofollow" class="external text" href="http://www.nasa.gov/mission_pages/stereo/news/6th-anniversary.html">STEREO Reaches New Milestone At Its Sixth Anniversary</a>