Jan Minář
Jan Minář (born April 9, 1981 in Prague) is a professional Czech tennis player. His brother Ivo is also a professional player.
Time
The most precise timekeeping device of the ancient world was the water clock, or clepsydra, one of which was found in the tomb of Egyptian pharaoh Amenhotep I (1525–1504 BC). They could be used to measure the hours even at night, but required manual upkeep to replenish the flow of water. The Ancient Greeks and the people from Chaldea (southeastern Mesopotamia) regularly maintained timekeeping records as an essential part of their astronomical observations. Arab inventors and engineers in particular made improvements on the use of water clocks up to the Middle Ages. In the 11th century, Chinese inventors and engineers invented the first mechanical clocks driven by an escapement mechanism.
Big Ben
Big Ben is the nickname for the Great Bell of the clock at the north end of the Palace of Westminster in London and is usually extended to refer to both the clock and the clock tower. The official name of the tower in which Big Ben is located was originally the Clock Tower, but it was renamed Elizabeth Tower in 2012 to mark the Diamond Jubilee of Elizabeth II.
William Brydone Jack Observatory
The William Brydone Jack Observatory is a small astronomical observatory on the campus of the University of New Brunswick in Fredericton, New Brunswick. Constructed in 1851, it was the first astronomical observatory built in British North America. The observatory was designated a National Historic Site of Canada in 1954.
Astronomer
The number of professional astronomers in the United States is actually quite small. The American Astronomical Society, which is the major organization of professional astronomers in North America, has approximately 7,000 members. This number includes scientists from other fields such as physics, geology, and engineering, whose research interests are closely related to astronomy. The International Astronomical Union comprises almost 10,145 members from 70 different countries who are involved in astronomical research at the Ph. D. level and beyond.
Šaloun Villa
Šaloun Villa or Šalounova vila is a studio in Prague designed by and for the sculptor Ladislav Šaloun. The villa was designed and built to construct the Jan Hus Memorial but it was also a meeting place for the Czech intelligentsia. Today the building has been restored and it is used for education.
Fredrik Church
The Fredrik Church was built in the baroque style after a design by Nicodemus Tessin the Younger. Its towers are a notable feature. The carillon is housed in the south tower, and there are 35 bells, which were installed in 1967 by the Bergenholtz bell foundry in Sigtuna. The clock chimes three times a day.
Evening
Evening is the period of time at the end of the day, usually from about 6pm to bedtime. It is a daily astronomic event of variable time period between daytime and night, and the period in which the daylight is decreasing, after the afternoon and before night. There is no exact time for when evening begins and ends (equally true with night). Though the term is subjective, evening is typically understood to begin shortly before sunset and during twilight (sunset and twilight vary throughout the year), lasting until night -- typically astronomical sunset. There can be no precise definition in terms of clock time, but it is socially considered to start around 6 pm. and to last until nighttime or bedtime.
3JS
3JS (pronounced: 3J's) is a Dutch band from Volendam, consisting of Jan Dulles, Jaap Kwakman and Jan de Witte. The band became nationally known after the success of their debut album, "Watermensen" in 2007 with their friends Jan Smit and Nick & Simon.
Metropolitan Life Insurance Company Tower
The Metropolitan Life Insurance Company Tower, colloquially known as the Met Life Tower, is a landmark skyscraper, built in 1909 and located on Madison Avenue near the intersection with East 23rd Street, across from Madison Square Park in Manhattan, New York City. Designed by the architectural firm of Napoleon LeBrun & Sons and Purdy and Henderson, Engineers, built by the Hedden Construction Company, the tower is modeled after the Campanile in Venice, Italy. The hotel located in the clock tower portion of the building has the address 5 Madison Avenue, while the office building covering the rest of the block, occupied primarily by Credit Suisse, is referred to as 1 Madison Avenue.
History of science
The astronomer Aristarchus of Samos was the first known person to propose a heliocentric model of the solar system, while the geographer Eratosthenes accurately calculated the circumference of the Earth. Hipparchus (c. 190 – c. 120 BC) produced the first systematic star catalog. The level of achievement in Hellenistic astronomy and engineering is impressively shown by the Antikythera mechanism (150-100 BC), an analog computer for calculating the position of planets. Technological artifacts of similar complexity did not reappear until the 14th century, when mechanical astronomical clocks appeared in Europe.
History of timekeeping devices
Although the Greeks and Romans did much to advance water clock technology, they still continued to use shadow clocks. The mathematician and astronomer Theodosius of Bithynia, for example, is said to have invented a universal sundial that was accurate anywhere on Earth, though little is known about it. Others wrote of the sundial in the mathematics and literature of the period. Marcus Vitruvius Pollio, the Roman author of De Architectura, wrote on the mathematics of gnomons, or sundial blades. During the reign of Emperor Augustus, the Romans constructed the largest sundial ever built, the Solarium Augusti. Its gnomon was an obelisk from Heliopolis. Similarly, the obelisk from Campus Martius was used as the gnomon for Augustus's zodiacal sundial. Pliny the Elder records that the first sundial in Rome arrived in 264 BC, looted from Catania, Sicily; according to him, it gave the incorrect time until the markings and angle appropriate for Rome's latitude were used—a century later.
New Delhi
Jantar Mantar located in Connaught Place was built by Maharaja Jai Singh II of Jaipur. It consists of 13 architectural astronomy instruments. The primary purpose of the observatory was to compile astronomical tables, and to predict the times and movements of the sun, moon and planets.
History of special relativity
The first derivations of relativity of simultaneity by synchronization with light signals were also simplified. Daniel Frost Comstock (1910) placed an observer in the middle between two clocks A and B. From this observer a signal is sent to both clocks, and in the frame in which A and B are at rest, they synchronously start to run. But from the perspective of a system in which A and B are moving, clock B is first set in motion, and then comes clock A – so the clocks are not synchronized. Also Einstein (1917) created a model with an observer in the middle between A and B. However, in his description two signals are sent from A and B to the observer. From the perspective of the frame in which A and B are at rest, the signals are sent at the same time and the observer "is hastening towards the beam of light coming from B, whilst he is riding on ahead of the beam of light coming from A. Hence the observer will see the beam of light emitted from B earlier than he will see that emitted from A. Observers who take the railway train as their reference-body must therefore come to the conclusion that the lightning flash B took place earlier than the lightning flash A."
Clock Tower, Brighton
The Clock Tower (sometimes called the Jubilee Clock Tower) is a free-standing clock tower in the centre of Brighton, part of the English city of Brighton and Hove. Built in 1888 in commemoration of Queen Victoria's Golden Jubilee, the distinctive structure included innovative structural features and became a landmark in the popular and fashionable seaside resort. The city's residents "retain a nostalgic affection" for it, even though opinion is sharply divided as to the tower's architectural merit. English Heritage has listed the clock tower at Grade II for its architectural and historical importance.
Prague astronomical clock
The oldest part of the Orloj, the mechanical clock and astronomical dial, dates back to 1410 when it was made by clockmaker Mikuláš of Kadaň and Jan Šindel, then later a professor of mathematics and astronomy at Charles University. The first recorded mention of the clock was on 9 October 1410. Later, presumably around 1490, the calendar dial was added and the clock facade was decorated with gothic sculptures.
Eastern Columbia Building
The Eastern Columbia Building, also known as the Eastern Columbia Lofts, is a thirteen story Art Deco building designed by Claud Beelman located at 849 S. Broadway in the Broadway Theater District of Downtown Los Angeles. It opened on September 12, 1930 after just nine months of construction. It was built at a cost of $1.25 million as the new headquarters and 39th store for the Eastern-Columbia Department Store, whose component Eastern and Columbia stores were founded by Adolph Sieroty and family. At the time of construction, the City of Los Angeles enforced a height limit of 150 feet, however the decorative clock tower was granted an exemption, allowing the clock a total height of 264 feet.
Vlasta Průchová
Vlasta Průchová (12 July 1926, Ružomberok – 16 June 2006, Prague) was a Czech jazz singer. From the second half of the 1940s, she gradually built up her leading position in the Czech jazz scene. Průchová was the mother of the renowned Czech-American pianist and composer Jan Hammer.
Astronomical clock
The first clock was built between 1352 and 1354 and stopped working sometime at the beginning of the 16th century. A second clock was then built by Herlin, Conrad Dasypodius, the Habrecht brothers, and others, between 1547 and 1574. This clock stopped working in 1788 or 1789 (as it apparently stopped working gradually, each component being disconnected
521 Brixia
Brixia (minor planet designation: 521 Brixia) is a minor planet orbiting the Sun that was discovered by American astronomer Raymond Smith Dugan on January 10, 1904. The name derives from "Brixia", the ancient name of the Italian city of Brescia.
When was the astronomical clock in the city Jan Minar is from built?
What city is Jan Minář from?
Prague
when was the astronomical clock in #1 built
1410