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Maunder Minimum
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==Eclipses during the Maunder Minimum== In his highly influential paper,<ref name=MM_PAPER /> [[John A. Eddy]] discussed [[solar eclipse]]s during the Maunder Minimum. From text of eye-witness reports of events in [[Solar eclipse of April 8, 1652|1652]], [[Solar eclipse of May 12, 1706|1706]] and [[Solar eclipse of May 3, 1715|1715]], he concluded that the [[solar corona]] was weak in intensity and unstructured during the Maunder Minimum. However, no graphical evidence of these events was available to him. A few representations of these events were available in political cartoons and on coins and medals but these were, almost certainly, not drawn by observers who had actually witnessed the events. There were two prints made by witnesses of the 1706 event but these were made for commercial reasons and not by trained astronomers. Then in 2012 Markus Heinz of the [[Berlin State Library]] discovered two paintings of the 1706 eclipse that were known to have existed but were thought lost. They were painted by a trained and skilful astronomer and observer, [[Maria Clara Eimmart]], the daughter of the director of an observatory housed on a bastion of the walls of [[Nürnberg]] castle. The paintings were in excellent agreement with detailed text description of the event by Johann Philipp Wurzelbau (also in Nürnberg) and by French mathematician and cartographer Jean de Clapiès and astronomer François de Plantade who observed the same event from the Babote Tower in [[Montpellier]].<ref name="Hayakawaetal_2020" /> This confirmed Eddy's conclusion about a weak and structureless corona during the Maunder minimum and agreed with simulations of the structureless F-corona, with no detected K-corona that is ordered by the magnetic field, as has been modelled for low coronal magnetic flux.<ref name="Rileyetal_2015">{{cite journal |author=Riley P.|display-authors=etal |date=2015 |title=Inferring the Structure of the Solar Corona and Inner Heliosphere During the Maunder Minimum using Global Thermodynamic MHD Simulations |url=https://iopscience.iop.org/article/10.1088/0004-637X/802/2/105/pdf |journal=Astrophys. J. |volume=802 |pages=105 |doi=10.1088/0004-637X/802/2/105|s2cid=618838 }}</ref> A full discussion of these observations of the Maunder minimum corona and how the K-corona had partially returned by the time of the 1715 event is given by Hayakawa et al. (2020).<ref name="Hayakawaetal_2020">{{cite journal |author=Hayakawa H.|display-authors=etal|date=January 2020 |title=Graphical Evidence for the Solar Coronal Structure during the Maunder Minimum: Comparative Study of the Total Eclipse Drawings in 1706 and 1715 |journal=J. Space Weather and Space Climate |language=en |volume=11 |pages=1 |issn=2115-7251 |doi=10.1051/swsc/2020035 |bibcode=2021JSWSC..11....1H |s2cid=225305095 |url= https://www.swsc-journal.org/articles/swsc/full_html/2021/01/swsc190067/swsc190067.html|doi-access=free }}</ref>
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