Categories
Research

Byzantine Astrolabe (sort of)

In a fragment on the astrolabe attributed to John Kamateros are a handful of interesting diagrams illustrating the various parts of an astrolabe. Here is the diagram showing the rete. There is also diagram illustrating the plate, and two showing different views of the back of the instrument.

Categories
Press and Pop Culture

Of Astrolabes and Wine

Further evidence that astrolabes are infiltrating culture is the name of winery in New Zealand: Astrolabe. Unfortunately, this winery is not really named after the instrument. Instead, situated in the Marlborough region of New Zealand, the winery is named “after the ship that in 1827 charted and explored the Marlborough Coast.” That ship was called […]

Categories
Museums

The Byzantine Astrolabe

I can’t reconstruct how I came across this page, but now that I have I can’t let it go without some comment. A search for the pair of terms “Brescia astrolabe” or “Byzantine astrolabe” gives as the second result a link to a Wikimedia page, Byzantine astrolabe at Brescia, 5th century AD (reconstruction).jpg A quick […]

Categories
Press and Pop Culture

GoT Starbucks Cups and Astrolabes

Game of Thrones fans, and a disturbingly large part of the internet, erupted over an errant paper coffee cup, complete with plastic sippy lid that somehow found its way onto a table on set. For a few seconds during the feast celebrating the defeat of the Night King, on the table near Daenerys Stormborn of […]

Categories
Press and Pop Culture

Astrolabes and S•Town

On Thursday, February 16, at 5:36 PM I was standing in a faculty meeting when my phone vibrated. I fished it out of my pocket and looked at the screen. I had just received a voicemail and a text from the same number, a number I didn’t recognize. The text asked, simply: “Is this the […]

Categories
HoS Advent Calendar 2016

Nicephorus Gregoras’s “περὶ κατασκευῆς … ἀστρολάβου”

A nice drawing of the rete from Nicephorus Gregoras’s “περὶ κατασκευῆς καὶ γενέσεως ἀστρολάβου” (“On the Mathematical Origin and Construction of the Astrolabe”). This rete, like other diagrams in copies of Gregoras’s text, lacks stars and finer details. In the few copies I’ve seen that include the stars, the rete closely resembles the one surviving […]

Categories
HoS Advent Calendar 2016

A Spherical Astrolabe

The most common type of astrolabe is the planispheric astrolabe, which works by projecting the sphere of the heavens onto a plane in a way that preserves angular distances and allows the user to carry out a wide variety of calculations.[1] The rarest form type of astrolabe is the spherical astrolabe. Although Latin and Arabic […]

Categories
History

Astrolabes or Mariner’s Astrolabe—A Primer

Celebrations are afoot in Ontario celebrating 400 years of Francophone presence in the region. An important part of those celebrations is Samuel de Champlain’s exploration of Ontario and his early encounter with First Nations cultures. Simcoe.com has a short post on an exhibit that includes one of Champlain’s navigational instruments: “Historic astrolabe on display in […]

Categories
Teaching

ePamphlet Guide to the Astrolabe

I recently posted An Introductory History to Astrolabes over at PACHS. There seemed to be considerable interest in that post, so I expanded it a bit and converted it to an ePamphlet. Much of the material comes out of my introduction to the history of science course. The goal was to produce a convenient introduction […]