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[[File: | [[File:Jon chesey.jpg|thumb|Jon at spring Crown Tourney 2017]] | ||
*''aka "Cheesy Jon" '' | *''aka "Cheesy Jon" '' | ||
Jon lives in Barony of Three Rivers and has been an active participant there since ~2016. His primary interest is rattan combat, but he is also well known for his work in astronomy, bardic, costuming, and voice heraldry. | |||
Jon lives in Barony of Three Rivers and has been an active participant there since ~2016 | |||
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=History in the SCA= | =History in the SCA= | ||
*Started in the SCA in 1999 after being introduced by Sir Donato el Lobo | *Started in the SCA in 1999 after being introduced by Sir Donato el Lobo | ||
==Awards== | ==Awards== | ||
*AoA: February 2004 | *AoA: February 2004 | ||
*Iren Fyrd: June 2017 | *Iren Fyrd: June 2017 | ||
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*Leather Mallet: September 2018 | *Leather Mallet: September 2018 | ||
*Golden Calon Swan: May 2019 | *Golden Calon Swan: May 2019 | ||
==Groups and Affiliations== | ==Groups and Affiliations== | ||
*Current Group: Barony of Three Rivers | *Current Group: Barony of Three Rivers | ||
*Previous Groups: | *Previous Groups: | ||
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==Offices== | ==Offices== | ||
*Baronial: | *Baronial: | ||
**Herald for Barony of Three Rivers (2016 - 2019) | **Herald for Barony of Three Rivers (2016 - 2019) | ||
**Gold Key for Barony of Three Rivers (2018 - | **Gold Key for Barony of Three Rivers (2018 - Current) | ||
**Webminister for Barony of Three Rivers (2021 | **Webminister for Barony of Three Rivers (2021 - Current) | ||
*Kingdom | *Kingdom | ||
**White Hawk Herald for [[Anton IV and Yseult, 72nd Crown]] (2019 - 2020) | **White Hawk Herald for [[Anton IV and Yseult, 72nd Crown]] (2019 - 2020) | ||
==Events Run== | ==Events Run== | ||
*Winter Court 2018 - A Norse Yule Celebration | *Winter Court 2018 - A Norse Yule Celebration | ||
* | *Gryphon's Fest 2019 - A Merry Band of Thieves | ||
* | *Gryphon's Fest 2021 - Our Saints Weekend | ||
*B3R Friday Night Bardic 2020 - 2021 (Online) | *B3R Friday Night Bardic 2020 - 2021 (Online) | ||
*B3R Online Feast | *B3R Online Feast | ||
==Championships== | ==Championships== | ||
*Rattan fighting champion for Barony of Three Rivers 2016-2017 | *Rattan fighting champion for Barony of Three Rivers 2016-2017 | ||
= | =Original Research= | ||
==Mathematical Astronomy== | ==Mathematical Astronomy== | ||
In 2017, Jon discovered an image of a 16th century astronomical toolkit. The toolkit contained several small instruments, but also included tables that would have been used to predict the time and location of various objects in the night sky. Mundanely, Jon has a degree in astronomy and began wondering how such tables were calculated in period. Specifically, he was interested in how astronomers in period, used the geocentric and heliocentric models to make planetary predictions. | In 2017, Jon discovered an image of a 16th century astronomical toolkit. The toolkit contained several small instruments, but also included tables that would have been used to predict the time and location of various objects in the night sky. Mundanely, Jon has a degree in astronomy and began wondering how such tables were calculated in period. Specifically, he was interested in how astronomers in period, used the geocentric and heliocentric models to make planetary predictions. | ||
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As Jon works through this text, he has been explaining the text in [http://jonvoisey.net/blog/ his blog]. This is an important contribution to the field as there is little material available to help readers understand the text. While the ''Almagest'' does have an English translation (from which Jon is working), the translator offers scant commentary to assist readers in this difficult text. While there are a few other texts that have looked at this work, they do not deal with it in its entirety and often use modern math to approach the topics. As such, Jon's blog is the first time in modern history that the ''Almagest'' is being explained in its entirety in its own context. | As Jon works through this text, he has been explaining the text in [http://jonvoisey.net/blog/ his blog]. This is an important contribution to the field as there is little material available to help readers understand the text. While the ''Almagest'' does have an English translation (from which Jon is working), the translator offers scant commentary to assist readers in this difficult text. While there are a few other texts that have looked at this work, they do not deal with it in its entirety and often use modern math to approach the topics. As such, Jon's blog is the first time in modern history that the ''Almagest'' is being explained in its entirety in its own context. | ||
==Observational Astronomy== | ==Observational Astronomy== | ||
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===The Great Quadrant=== | ===The Great Quadrant=== | ||
The first instrument Jon built (with help from his father who is a carpenter mundanely) was an astronomical quadrant based on one originally built by Tycho Brahe in 1569. The quadrant was built over the summer of 2018 and disassembles for easy transport. The instrument is leveled with screws in each corner that, while not in the original design by Brahe, was found in his later instruments. To tell if it is level, a plumb hangs from the central axis above a mark which indicates when it is level. The wire for the plumb also hangs in front of the scale for the instrument to indicate where the reading should be taken from. | The first instrument Jon built (with help from his father who is a carpenter mundanely) was an astronomical quadrant based on one originally built by Tycho Brahe in 1569. The quadrant was built over the summer of 2018 and disassembles for easy transport. The instrument is leveled with screws in each corner that, while not in the original design by Brahe, was found in his later instruments. To tell if it is level, a plumb hangs from the central axis above a mark which indicates when it is level. The wire for the plumb also hangs in front of the scale for the instrument to indicate where the reading should be taken from. | ||
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====Calibration & Testing of Astronomical Models==== | ====Calibration & Testing of Astronomical Models==== | ||
In order to have the necessary observations to properly calibrate and test the astronomical models Jon is studying, Jon seeks to take frequent observations. However, the observations necessary for calibration occur only when planets are directly opposite the earth from the sun which happens quite infrequently. Additional observations at other times will be necessary to test the models, but observations for this goal are rare. | In order to have the necessary observations to properly calibrate and test the astronomical models Jon is studying, Jon seeks to take frequent observations. However, the observations necessary for calibration occur only when planets are directly opposite the earth from the sun which happens quite infrequently. Additional observations at other times will be necessary to test the models, but observations for this goal are rare. | ||
====Star Map/Catalog==== | ====Star Map/Catalog==== | ||
Since the primary function of observing planets for modeling is not demanding, Jon seeks to use the quadrant for other astronomical goals. In particular, he is working to build a catalog of the position of stars based on his observations. This is inspired by the 1603 publication the ''Uranometria'' which took Tycho's observations and turned them into illustrated star maps. At present, Jon's catalog has over | Since the primary function of observing planets for modeling is not demanding, Jon seeks to use the quadrant for other astronomical goals. In particular, he is working to build a catalog of the position of stars based on his observations. This is inspired by the 1603 publication the ''Uranometria'' which took Tycho's observations and turned them into illustrated star maps. At present, Jon's catalog has over 400 individual objects comprised of over 800 observations. | ||
=Classes Offered= | =Classes Offered= | ||
==Bardic== | ==Bardic== | ||
*History of Calontir through Song | *History of Calontir through Song | ||
== | ==Astronomy== | ||
*A Brief History of Medieval Astronomy | |||
* | *Christianity and Astronomy in the Medieval Period | ||
*Movement of the Heavens | |||
*De Sphaera (On the Sphere) | |||
=Activities= | =Activities= | ||
*Rattan fighting | *Rattan fighting | ||
*Bardic singing | *Bardic singing | ||
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=In Case of Court= | =In Case of Court= | ||
No special preferences. Surprises are fine. | No special preferences. Surprises are fine. | ||
=Rat out a Friend= | =Rat out a Friend= | ||
[[Too Many Sons]] - song written to be performed at Gulf Wars XXIX 2020: The War That Never Was | |||
[[Category:People]] | |||
[[Category:People | |||