A composed satellite photograph of <a href="https://en.wikipedia.org/wiki/Africa" class="extiw" title="en:Africa">Africa</a>.
NASA
The image is a crop (and jpeg encoding) of the 21600 x 10800 TIFF from <a rel="nofollow" class="external autonumber" href="http://visibleearth.nasa.gov/view_rec.php?vev1id=11656">[1]</a>. Care was taken to include the Azores, Cape Verde, the Arabian peninsula, and the islands immediately East off Madagascar.