astronomy

Olomouc astronomical clock

Olomouc astronomical clock 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 Olomouc astronomical clock rather than just read about it. In short: The Olomouc Astronomical Clock (Czech: Olomoucký orloj) is part of the northern wall of the town hall of Olomouc, Czech Republic. The astronomical clock was built in the 15th century and has been reconstructed several times.

Key takeaways

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

Reference excerpt

The Olomouc Astronomical Clock (Czech: Olomoucký orloj) is part of the northern wall of the town hall of Olomouc, Czech Republic. The astronomical clock was built in the 15th century and has been reconstructed several times. The current appearance is from 1955 in the socialist realism style. It is one of the few heliocentric clocks in the world.

Physical description

The clock is located on the Northeastern facade of the town hall, the arched alcove is approximately 14 meters high. The lower dial represents the earthly sphere and indicates minute, hour, day, month, year and phase of the moon. The calendar at the bottom of the clock indicates the Czech name days and important days of the Communist regime, such as the birthdays of Stalin and Gottwald. The upper dial represents the heavenly sphere and shows a star map, the Sun, Earth and planets against a background of the twelve houses of the zodiac. Noon is announced by a brass cockrel, and animated figurines of various proletariat figures who scroll past the windows of the clock for seven minutes. Professions represented include a miner, baker, clerk, volleyball player, auto mechanic and factory worker. The main facade is surrounded by a mosaic depicting the Ride of the Kings and a "procession of maidens" (above), a worker holding a wrench (left), and a chemist holding a flask (right). Around the perimeter of the alcove there are mosaic allegorical representations of the twelve seasons and two traditional festivals. There are sixteen bells that were cast by P. Hilzer in 1898. According to the original design, the carillon was to play The Internationale, but now plays three folksongs instead: Daleká, šeroká cesta přes Holomóc, Vrbe jož se zelenajó, and Za Náměšťó na kopečko hádajó se o děvečko.

History

The first "undisputed" mention of the clock is from 1519 but according to tradition, it was built between 1419 and 1422. Local legend claims that the astronomer was blinded so that he could not build a similar work in another city. The clock has been rebuilt several times during its history and equipped with various moving figurines, including St. Wenceslas, St. George on his horse and the dragon, and Three kings on their camels. In 1800, the clock stopped for eleven years, then after temporary repairs stood still again until 1898. The oldest parts of the current clock are from that year, when the clock was equipped with a heliocentric dial by Eduard Korfhage. In 1926 it was decorated by prominent artist Jano Kohlerem. The clock was damaged by a grenade in May 1945, in the final days of the Second World War, by soldiers from the retreating Nazi German army passing through Olomouc. Fragments from that version are now kept in the city museum. Shortly afterward it was returned to the form it was given in 1926, but was then completely rebuilt in 1955 by Karel Svolinský in the Socialist realism style. The commissioning ceremony took place on 9 May 1955 in the presence of Communist dignitaries. The clock was featured in the opening scenes of the 1969 Czech film The Joke based on the book by Milan Kundera. In the 2008 Czech animated film Goat Story, the clock is featured prominently and is a central plot device, with one of the side characters, Matthew designing the plans for the clock before they are vandalized by people at the bar, but the clock tower is built regardless.

Illustrations

Worked examples

Example 1 — a first encounter with Olomouc astronomical clock

Start with the simplest possible case. Write down what Olomouc astronomical clock 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 Olomouc astronomical clock 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 Olomouc astronomical clock 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 Olomouc astronomical clock

In research: Olomouc astronomical clock 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 Olomouc astronomical clock 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: Olomouc astronomical clock is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical clocks in the Czech Republic, Buildings and structures in Olomouc, so understanding it makes those chapters shorter.
In everyday life: Look for Olomouc astronomical clock 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Olomouc astronomical clock” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Olomouc astronomical clock in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Olomouc astronomical clock 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 Olomouc astronomical clock out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Olomouc astronomical clock in simple terms?

Why does Olomouc astronomical clock 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 Olomouc astronomical clock?

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 Olomouc astronomical clock.