Page 68r from the mysterious <a href="https://en.wikipedia.org/wiki/Voynich_manuscript" class="extiw" title="en:Voynich manuscript">Voynich manuscript</a>, which is undeciphered to this day. This three-page foldout from the manuscript includes a chart that appears astronomical(looks like a creation for a sun,or "fusion core startup process")
Unknown author<span style="display: none;">Unknown author</span>
Exact date of creation unknown, thought to have been written between 1404 and 1438.
<a href="https://en.wikipedia.org/wiki/Beinecke_Rare_Book_and_Manuscript_Library" class="extiw" title="en:Beinecke Rare Book and Manuscript Library">Beinecke Rare Book &amp; Manuscript Library</a>, <a href="https://en.wikipedia.org/wiki/Yale_University" class="extiw" title="en:Yale University">Yale University</a> (<a rel="nofollow" class="external autonumber" href="http://beinecke.library.yale.edu/dl_crosscollex/getSETS.asp?ITEM=2002046">[1]</a>).