Satellite image of clouds, with an <a href="https://en.wikipedia.org/wiki/actinoform_cloud" class="extiw" title="w:actinoform cloud">w:actinoform cloud</a> in the center of the image and an open-cell <a href="https://en.wikipedia.org/wiki/stratocumulus_cloud" class="extiw" title="w:stratocumulus cloud">w:stratocumulus cloud</a> formation at the center top.
NASA
<a rel="nofollow" class="external free" href="http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=17053">http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=17053</a>