Example of solar coronal loops observed by the <i>Transition Region And Coronal Explorer</i> (<i><a href="https://en.wikipedia.org/wiki/TRACE" class="extiw" title="en:TRACE">TRACE</a></i>), 171 Å filter. These loops have a temperature of approximately 10<sup>6</sup> K. These loops contrast greatly with the cool <a href="https://en.wikipedia.org/wiki/chromosphere" class="extiw" title="en:chromosphere">chromosphere</a> below.
NASA
2005-09-08 11:42
<a rel="nofollow" class="external free" href="https://trace.lmsal.com/POD/TRACEpodarchive24.html">http://trace.lmsal.com/POD/TRACEpodarchive24.html</a> (<a rel="nofollow" class="external text" href="https://trace.lmsal.com/POD/images/T171_20050908_114211X17.jpg">direct link</a>)