perihelion) the point in its orbit where a planet is farthest from the Sun; when referring to objects orbiting the Earth the term apogee is used; the term apoapsis is used for orbits around other bodies. 2. Astronomical unit – (1 AU = 149‚597‚870.691 kilometers) An Astronomical Unit is approximately the mean distance between the Earth and the Sun. It is a derived constant and used to indicate distances within the solar system. Its formal definition is the radius of an unperturbed circular
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Pluto discovered by Brown last year. "We know of 44" dwarf planets so far‚ Brown said. "We will find hundreds. It’s a very huge category." A clear majority of researchers voted for the new definition at a meeting of the International Astronomical Union (IAU) in Prague‚ in the Czech Republic. The IAU decides the official names of all celestial bodies. The tough decision comes after a multiyear search for a scientific definition of the word "planet." The term never had an official meaning before. What
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correct in his math equations‚ but also he was very secretive about his work and studies. Throughout his work with Kepler‚ he concealed much information‚ not allowing Kepler to steal any of his work. Although they worked together in discovering new astronomical discoveries‚ they hardly ever got along and constantly engaged in arguments. Furthermore‚ in Brahe’s observatory‚ he also constantly through on parties throughout the year. Inviting friends‚ family‚ and decorating the place with numerous gardens
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generally referred to in non-technical language as "constellations")‚ which are patterns formed by prominent stars within apparent proximity to one another on Earth’s night sky. There are 88 standard constellations recognized by the International Astronomical Union (IAU) since 1922. The majority of these go back to the 48 constellations defined by Ptolemy in his Almagest (2nd century). The remaining ones were defined in the 17th and 18th century; the most recent ones are found on the southern sky‚ defined
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imagine my shock‚ when I turned on the news on August the 24th 2006 and saw the headline "Astronomers Rule‚ Pluto is not a Planet". Supposedly a clear majority of researchers voted for the new definition at a meeting of the International Astronomical Union (IAU) in Prague‚ the day before. According to the new definition‚ a full-fledged planet is an object that orbits the sun and is large enough to have become round due to the force of its own gravity. In addition‚ a planet has to dominate the neighbourhood
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Platonic solid theory produced a close fit to the planet-to-sun distances that Copernicus had found. Thrilled that he had found evidence of the hand of God in the solar system’s design‚ Kepler now sought better data. He hoped that more accurate astronomical observations would prove his
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Communist system collapsed very quickly. And Czechoslovakia was no exception to the rule. In the space of just a few weeks in November 1989‚ the Communist system in Czechoslovakia was brought to its knees. Massive protests on the streets of Prague – often several hundred thousand strong – forced the resignation of the hard-line Communist Party in what became known as “the velvet revolution.” The attack on November 17‚ 1989 that seemingly hastened the fall of the government was the offshoot
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counting house‚ a checkered cloth would be placed on a table‚ and markers moved around on it according to certain rules‚ as an aid to calculating sums of money. Several analog computers were constructed in ancient and medieval times to perform astronomical calculations. These include the Antikythera mechanism and the astrolabe from ancient Greece (c. 150–100 BC)‚ which are generally regarded as the earliest known mechanical analog computers.[3] Hero of Alexandria (c. 10–70 AD) made many complex mechanical
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much more understandable and enjoyable. The book features a lot of the scientific aspects of what occurred‚ which perhaps might have deterred some more casual or less-informed readers‚ and there is also a lot of explanation in detail about Harrison’s clocks. However‚ Dava Sobel wrote about this in a very clear way‚ and made the entire events accessible to more readers through the concise language and writing style that she uses. So I enjoyed the text for the large amount of background information that
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Aryabhatta Biography Wikipedia.ame While there is a tendency to misspell his name as "Aryabhatta" by analogy with other names having the "bhatta" suffix‚ his name is properly spelled Aryabhata: every astronomical text spells his name thus‚ including Brahmagupta’s references to him "in more than a hundred places by name". Furthermore‚ in most instances "Aryabhatta" does not fit the metre either. Time and place of birth Aryabhata mentions in the Aryabhatiya that it was composed 3‚630 years into
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