Tycho Brahe's Uraniborg — from his book Astronomiae instauratae mechanica (1598) Photo Credit: By Tycho Brahe - Transferred from en.wikipedia to Commons. Original uploader was Wikibob at en.wikipedia on 2004-07-04 (original upload date), Public Domain, https://commons.wikimedia.org/w/index.php?curid=1920637
