Diagram of umbra, penumbra and amtumbra in a two-body system.
<a href="//commons.wikimedia.org/w/index.php?title=User:Qarnos~commonswiki&amp;action=edit&amp;redlink=1" class="new" title="User:Qarnos~commonswiki (page does not exist)">Qarnos</a>
2008-03-08
<span class="int-own-work" lang="en">Own work</span>