This  image was created with <a href="https://en.wikipedia.org/wiki/darktable" class="extiw" title="w:darktable">darktable</a>.
<a href="//commons.wikimedia.org/wiki/User:Surveyor54" title="User:Surveyor54">Surveyor54</a>
<span class="int-own-work" lang="en">Own work</span>