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polaris
polaris
Last Update: 2012-03-13
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ini kerusakan lcd,lcd bocor caitan kristal pecah ini bukan kerusakan polaris ini kerusakan lcd dan harus ganti lcd
ini bukan kerusakan polaris ini kerusakan lcd dan ganti lcdharus
Last Update: 2025-01-28
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early ideas about the figure of the earth held the earth to be, and the heavens a physical dome spanning over it. two early arguments for a spherical earth were that lunar eclipses were seen as circular shadows which could only be caused by a spherical earth, and that polaris is seen lower in the sky as one travels south. the early greeks, in their speculation and theorizing, ranged from the flat disc advocated by homer to the spherical body postulated by pythagoras — an idea supported later by aristotle. pythagoras was a mathematician and to him the most perfect figure was a sphere. he reasoned that the gods would create a perfect figure and therefore the earth was created to be spherical in shape. anaximenes, an early greek scientist, believed strongly that the earth was rectangular in shape. since the spherical shape was the most widely supported during the greek era, efforts to determine its size followed. plato determined the circumference of the earth to be 400,000 stadia (between 62,800 km/39,250 mi and 74,000 km/46,250 mi ) while archimedes estimated 300,000 stadia ( 55,500 kilometres/34,687 miles ), using the hellenic stadion which scholars generally take to be 185 meters or 1/10 of a geographical mile. plato's figure was a guess and archimedes' a more conservative approximation.
Last Update: 2021-01-12
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