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astronomical
astroˈnomical, a. [f. prec. + -al1.] 1. a. Connected with, bearing upon, dealing with astronomy. (Cf. an Astronomical Society with an astronomic fact.) astronomical year: one of which the length is determined by astronomical observations, apart from conventional reckoning. astronomical ring, astrono... Oxford English Dictionary
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ASTRONOMICAL | English meaning - Cambridge Dictionary
ASTRONOMICAL definition: 1. connected with astronomy: 2. An astronomical amount is extremely large: 3. connected with…. Learn more.
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Astronomical unit (AU, or au) | Definition, Conversion, & Facts
Dec 22, 2023Astronomical unit, a unit of length effectively equal to the average, or mean, distance between Earth and the Sun, defined as 149,597,870.7 km (92,955,807.3 miles). The astronomical unit provides a convenient way to express and relate distances of objects in the solar system and to carry out astronomical calculations.
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astronomical
astronomical/ˌæstrəˈnɔmɪkl; ˌæstrə`nɑmɪkl/ adj1 of astronomy 天文学的.2 (infml 口) very large in amount, size, etc 极大的; 庞大的 He's been offered an astronomical salary. 有人出巨额薪水聘请他. 牛津英汉双解词典
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Astronomical unit - Wikipedia
The astronomical unit (symbol: au, or AU or AU) is a unit of length, roughly the distance from Earth to the Sun and approximately equal to 150 billion metres (93 million miles) or 8.3 light-minutes. The actual distance from Earth to the Sun varies by about 3% as Earth orbits the Sun, from a maximum to a minimum and back again once each year.The astronomical unit was originally conceived as the ...
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EarthSky | What is an astronomical unit?
Jul 31, 2022The precise distance of an astronomical unit is 92,955,807 miles (149,597,871 km). Earth's orbit around the sun isn't a perfect circle. So Earth's distance from the sun changes throughout ...
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Prague Astronomical Clock: The Complete Guide By A Local
Jun 13, 2023The Prague Clock is first mentioned in a historical document in 1410, so it dates from either the late 14 th or early 15 th century. It was initially built by clockmaker Mikuláš of Kadaň, with some input from Jan Šindel, a mathematician and astronomer at Charles University in Prague. ... Watch the Apostles' parade, but also keep an eye on ...
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International Astronomical Union (IAU) | Britannica
Nov 24, 2023Why Is Pluto No Longer a Planet? Where Did the Moon Come From? How Do You Tell the Difference Between Total, Annular, Solar, and Lunar Eclipses? ... Discover the International Astronomical Union's naming schemes for features on Pluto and its moons. Learn how physical features on Pluto, Charon, and nearby moons are named according to guidelines ...
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Astronomical clock - Wikipedia
The 16th-century church clock at Arnemuiden indicates the lunar phase and the time of high tide. Franeker. The Eise Eisinga Planetarium, built 1774-1781, is an orrery and astronomical clock which shows the movements of the solar system. Arnemuiden clock showing high and low water (hoog and laag)
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what is israel astronomical association
The Israeli Astronomical Association is an Israeli nonprofit organization.
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Prague astronomical clock - Wikipedia
The Prague astronomical clock or Prague Orloj ( Czech: Pražský orloj [praʃskiː orloj]) is a medieval astronomical clock attached to the Old Town Hall in Prague, the capital of the Czech Republic . The clock was first installed in 1410, making it the third-oldest astronomical clock in the world and the oldest clock still in operation.
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Please explain how to make an astronomical telescope
an astronomical telescope a telescope is an optical tool that increases the apparent size of distant objects as well as their apparent brightness they more curved optical lenses or mirrors to gather light or electromagnetic radiation and to bring to focus the image that can be observed or studying an astronomical
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Is the chance of dying from a car accident less than dying from an astronomical event? On page 62 of David Deutsch's excellent _The Beginning of Infinity_ he writes: > a typical child born in the United States today...
. > > Note: The probability of dying in a car accident is at least 12 times and perhaps as much as 100 times as great as that of dying from an astronomical improves, this will presumably continue to fall rapidly during the lifetimes of children born today \-- but then, so will the probability of dying from an astronomical
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astronomical arc in Chinese - astronomical arc meaning in Chinese ...
astronomical arc in Chinese : 天文弧 …. click for more detailed Chinese translation, meaning, pronunciation and example sentences.
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Study on performance testing techniques for astronomical optical cameras
Mar 16, 2023Objective Cameras is a critical component of an optical telescope observation system, and their performance significantly affects the quality and efficiency of astronomical observ irla.cn
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