Definition of Parsec
<a href="//commons.wikimedia.org/wiki/User:KES47" class="mw-redirect" title="User:KES47">Kes47</a> (<a href="//commons.wikimedia.org/wiki/User_talk:KES47" class="mw-redirect" title="User talk:KES47">?</a>)
CC BY 3.0
<a href="//commons.wikimedia.org/wiki/File:Parsec_b.png" title="File:Parsec b.png">File:Parsec b.png</a>