astronomy

Giorgio Jan

Giorgio Jan is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Giorgio Jan rather than just read about it. In short: Giorgio Jan (21 December 1791 in Vienna – 8 May 1866, Milan) was an Italian taxonomist, zoologist, botanist, herpetologist, and writer. He is also known as Georg Jan or Georges Jan.

Key takeaways

Giorgio Jan belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Giorgio Jan to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Giorgio Jan from memory before moving on to harder problems.

Reference excerpt

Giorgio Jan (21 December 1791 in Vienna – 8 May 1866, Milan) was an Italian taxonomist, zoologist, botanist, herpetologist, and writer. He is also known as Georg Jan or Georges Jan. He was the first director of the natural history museum in Milan.

Biography

After having been an assistant at the University of Vienna until 1816, Jan obtained the post of professor of botany at the university of Parma, as well as becoming Director of the botanical garden. Already in his time at Wien, he started offering herbaria for purchase to princely courts - an example being the Oesterreichs Flora (Flora Austriae), sent between 1815 and 1818 to Karl August, Grand Duke of Saxe-Weimar-Eisenach. In Parma, he continued to offer exsiccata-like series with plant specimens for sale, an example being the Herbarium portatile with the species list published in 1820. At that time, the Duchy of Parma was no longer under Austrian jurisdiction following the Congress of Vienna after the defeat of Napoleon at Waterloo. Giuseppe de Cristoforis died in 1837, bequeathing his collections to the town of Milan on condition that the municipality created a natural history museum whose direction had to be entrusted to Giorgio Jan, who offered his own collections. The Museo Civico di Storia Naturale di Milano was created the following year and is the oldest natural history museum in Italy. Later on, Jan engaged Ferdinando Sordelli (1837–1916), artist and naturalist, who illustrated his publications starting in 1860. Jan's main interest was botany, but he made immense collections of natural history, including fossils and minerals. With Giuseppe de Cristoforis, he published many catalogues of specimens, often offered for sale or exchange. In these many new species, mainly insects and molluscs were described. In the scientific field of herpetology he is credited with having described more than 85 new species of snakes, and is honoured by having several species and subspecies named after him, such as the Texas night snake (Hypsiglena jani), the Mexican pine snake (Pituophis deppei jani), Jan's shovelsnout snake (Prosymna janii), and Jan's centipede snake (Tantilla jani). In the 1860s, he began compiling what was to become the Iconographie Général des Ophidiens, an extensive illustrated collection of scientific papers relating to snakes, but he died before it was completed. The work was eventually finished and published in several parts by Sordelli.

Publications (incomplete list) Iconographie Générale des Ophidians (1860–1866). (in French).

References

Further reading Conci, Cesare (1966). "Il centenario di Giorgio Jan, la sua attività malacologica e le collezioni di Molluschi del Museo Civico di Storia Naturale di Milano". Lavori della Società Malacologica Italiana 3: 1–8. (in Italian). Conci, Cesare (1978). Il Museo Civico di Storia Naturale di Milano. Milan: Banca Popolare di Milano. (in Italian). Conci, Cesare (1984). Museo Civico di Storia Naturale di Milano, Musaeum Septalianum una collezione scientifica nella Milano del Seicento a cura di Antonio Aimi, Vincenzo De Michele, Alessandro Morandotti. Florence: Giunti Marzocco. (in Italian).

External links Museo Civico di Storia Naturale Milano Archived 12 May 2016 at the Wayback Machine (in Italian). Elenco sistematico degli ofidi descritti e disegnati per l'iconografia generale (1863) Iconographie générale des ophidiens (1860–1881) Gaedike R, Groll EK, Taeger A (2012). Bibliography of the literature on entomology from the beginning until 1863 : online database - version 1.0 - Senckenberg Deutsches Entomologisches Institut.

Illustrations

Worked examples

Example 1 — a first encounter with Giorgio Jan

Start with the simplest possible case. Write down what Giorgio Jan claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Giorgio Jan before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Giorgio Jan ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Giorgio Jan

In research: Giorgio Jan appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Giorgio Jan in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Giorgio Jan is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1791 births, 1866 deaths, 19th-century Italian botanists, so understanding it makes those chapters shorter.
In everyday life: Look for Giorgio Jan outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Giorgio Jan in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Giorgio Jan means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Giorgio Jan out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Giorgio Jan in simple terms?

Giorgio Jan (21 December 1791 in Vienna – 8 May 1866, Milan) was an Italian taxonomist, zoologist, botanist, herpetologist, and writer. He is also known as Georg Jan or Georges Jan.

Why does Giorgio Jan matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Giorgio Jan?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Giorgio Jan.