A planetarium is a theatre built primarily for presenting educational and entertaining shows about astronomy and the night sky, or for training in celestial navigation.
An orrery is a mechanical model of the Solar System that illustrates or predicts the relative positions and motions of the planets and moons, usually according to the heliocentric model. It may also represent the relative sizes of these bodies; however, since accurate scaling is often not practical due to the actual large ratio differences, a subdued approximation may be used instead. Though the Greeks had working planetaria, the first orrery that was a planetarium of the modern era was produced in 1713, and one was presented to Charles Boyle, 4th Earl of Orrery – hence the name. They are typically driven by a clockwork mechanism with a globe representing the Sun at the centre, and with a planet at the end of each of the arms.
The Prague astronomical clock or Prague Orloj is a medieval astronomical clock attached to the Old Town Hall in Prague, the capital of the Czech Republic.
An astronomical clock, horologium, or orloj is a clock with special mechanisms and dials to display astronomical information, such as the relative positions of the Sun, Moon, zodiacal constellations, and sometimes major planets.
Eise Jeltes Eisinga was a Frisian amateur astronomer who built the Eise Eisinga Planetarium in his house in Franeker, Dutch Republic. The orrery still exists and is the oldest functioning planetarium in the world.
Franeker is one of the eleven historical cities of Friesland and capital of the municipality of Waadhoeke. It is located north of the Van Harinxmakanaal and about 20 km west of Leeuwarden. As of 1 January 2014, it had 12,781 inhabitants. The Eise Eisinga Planetarium, established in 1781, is located in the city.
The University of Franeker (1585–1811) was a university in Franeker, Friesland, the Netherlands. It was the second oldest university of the Netherlands, founded shortly after Leiden University.
The McLaughlin Planetarium is a former working planetarium whose building occupies a space immediately to the south of the Royal Ontario Museum in Toronto, at 100 Queen's Park. Founded by a grant from philanthropist Colonel R. Samuel McLaughlin, the facility was opened to the public on October 26, 1968. It had, for its time, a state-of-the-art electro-mechanical Zeiss planetarium projector that was used to project regular themed shows about the stars, planets, and cosmology for visitors. By the 1980s the planetarium's sound-system and domed ceiling were used to display dazzling music-themed laser-light shows. The lower levels of the planetarium contained a gallery called the "Astrocentre" that featured space-related exhibits, related artifacts on the history of astronomy and was also home of the world's first commercial Stellarium
The Strasbourg astronomical clock is located in the Cathédrale Notre-Dame of Strasbourg, Alsace, France. It is the third clock on that spot and dates from the time of the first French possession of the city (1681–1870). The first clock had been built in the 14th century and the second in the 16th century when Strasbourg was a Free imperial city of the Holy Roman Empire.
The German Clock Museum is situated near the centre of the Black Forest town of Furtwangen im Schwarzwald (Germany), a historical centre of clockmaking. It features permanent and temporary exhibits on the history of timekeeping. The museum is part of the local technical college.
An astrarium, also called a planetarium, is a medieval astronomical clock made in the 14th century by Italian engineer and astronomer Giovanni Dondi dell'Orologio. The Astrarium was modeled after the solar system and, in addition to counting time and representing calendar dates and holidays, showed how the planets moved around the celestial sphere in one timepiece. This was its main task, in comparison with the astronomical clock, the main task of which is the actual reading of time. A complex mechanism, it combined the functions of a modern planetarium, clock, and calendar into a singular constructive device. Devices that perform this function were known to have been created prior to the design of Dondi, though relatively little is known about them. It is occasionally erroneously claimed by the details of some sources that the Astrarium was the first mechanical device showing the movements of the planets.
Arjen Roelofs was a Dutch astronomer.
A Philosopher Lecturing on the Orrery, or the full title, A Philosopher giving that Lecture on the Orrery in which a lamp is put in place of the Sun, is a 1766 painting by Joseph Wright of Derby depicting a lecturer giving a demonstration of an orrery – a mechanical model of the solar system – to a small audience. It is now in the Derby Museum and Art Gallery The painting preceded his similar An Experiment on a Bird in the Air Pump.
The Birla Planetarium in Kolkata, West Bengal, India, is a single-storeyed circular structure designed in the typical Indian style, whose architecture is loosely styled on the Buddhist Stupa at Sanchi. Situated at Chowringhee Road adjacent to the Victoria Memorial, St. Paul's Cathedral and the Maidan in Central Kolkata, it is the largest planetarium in Asia and the second largest planetarium in the world. There are two other Birla Planetariums in India: B.M. Birla Planetarium in Chennai and the Birla Planetarium in Hyderabad.
Abrams Planetarium is the planetarium on the campus of Michigan State University, Michigan, United States.
Langat Singh College, commonly known as L. S. College, is a college in Muzaffarpur, in the Indian state of Bihar. It was established on 3 July 1899, and is one of the city's oldest colleges. It is named after its founder Langat Singh. It is affiliated to Babasaheb Bhimrao Ambedkar Bihar University, and offers undergraduate and postgraduate courses in science and arts.
Eelco Alta was a Frisian clergyman, theologian, and veterinarian.
Waadhoeke is a municipality of Friesland in the northern Netherlands. It was established 1 January 2018 and consists of the former municipalities of Franekeradeel, het Bildt, Menameradiel and parts of Littenseradiel, all four of which were dissolved on the same day.
The Linden Observatory Complex is a heritage-listed former observatory and manufacture of optical precision implements and now residence, museum, observatory, education facility and meeting venue located at 91 – 111 Glossop Road, Linden, City of Blue Mountains, New South Wales, Australia. It was designed and built by Ken Beames from 1938 to 1948. It is also known as K Beames Engineering Co. The property is owned by the Linden Observatory Trust. It was added to the New South Wales State Heritage Register on 5 March 2010.
