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.
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
Jaroslav Tuček
Jaroslav Tuček (born 24 August 1882, date of death unknown) was a Bohemian fencer. He won a bronze medal in the team sabre event at the 1908 Summer Olympics.
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.
Pierre de Rivaz
Pierre de Rivaz (17111772) was a French clockmaker of the 18th century, from Saint-Gingolph. He built a clock in 1740 that was powered by variations in air temperature and pressure, a type of Atmos clock.
1948 French Championships – Men's Singles
Frank Parker defeated Jaroslav Drobný 6–4, 7–5, 5–7, 8–6 in the final to win the Men's Singles tennis title at the 1948 French Championships.
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.
Jaroslav Kentoš
Jaroslav Kentoš (born 14 May 1974) is a former football player from Slovakia and current manager of MŠK Žilina. He spent successful period of coaching as a manager of ŽP Šport Podbrezová. He played in the Gambrinus liga for Bohemians Prague.
Jaroslav Diviš
Jaroslav Diviš (born 9 July 1986) is a Czech football midfielder who currently plays for 1. FC Slovácko on loan from Mladá Boleslav.
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.
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.
John Knibb
John Knibb (1650–1722) was an English clockmaker born in Claydon, Oxfordshire. He produced various clocks and watches including bracket clocks, lantern clocks, longcase clocks, and some wall-clocks, as well as building and maintaining several turret clocks. Even though his main market was catering to customers of modest means, he also dominated the higher-quality sector. Only six of Knibb's watches are known to survive.
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.
Jaroslav Satoranský
Jaroslav Satoranský (born December 17, 1939, Prague) is a Czech actor. He belongs to famous Czech stage players and also to film actors.
A Night at Karlstein
A Night at Karlstein () is a 1974 Czechoslovak musical film directed by Zdeněk Podskalský, based on an 1884 play by Jaroslav Vrchlický.
Jaroslav Drobný
From 1938 to 1949 Drobný played center in the Czechoslovak ice hockey league. He was a Silver medalist with the Czechoslovak ice hockey team in the 1948 Olympics. In the final match, Czechoslovakia and Canada tied goalless but Canada won the gold medal due to a better overall goal average. Drobný scored 9 goals in 8 games at the Olympics. Jaroslav Drobný was also a member of the Czechoslovak national ice hockey team which won the gold medals at the 1947 World Ice Hockey Championships in Prague. He scored 15 goals in 7 games in the tournament including a hat-trick in the decisive victory over USA which gave his country its first ever World Championships title. In 1997, Drobný was inducted in the International Ice Hockey Federation (IIHF) Hall of Fame.
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.
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.
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.
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.
When did they build the astronomical clock in the city Jaroslav Drobný is from?
What city is Jaroslav Drobný from?
Prague
when was the astronomical clock in #1 built
1410