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Posidonius (c. 135 BC - c. 51 BC), was a Greek philosopher, astronomer, geographer, and historian. Nicknamed "the Athlete", he was born in Apamea , northern Syria, and probably died in Rome or Rhodes.
Posidonius was a student of Panaetius of Rhodes . He was a stoic with many influential friends. His pupils were Cicero and Pompey. Some of his researches were valuable. As Pytheas he believed the tide is caused by the MoonFor other moons in the solar system see natural satellite. For other uses see Moon (disambiguation). The Moon is the only natural satellite of Earth. It has no formal name other than "The Moon" although it is occasionally called Luna ( Latin for moon to d. He travelled to the west to the Atlantic OceanFor other uses, see Atlantic (disambiguation The Atlantic Ocean is Earth's second-largest ocean, covering approximately one-fifth of its surface. The ocean's name, derived from Greek mythology, means the " Sea of Atlas". This ocean occupies an elongated,. In about 90 BCCenturies: 2nd century BC 1st century BC 1st century Decades: 140s BC 130s BC 120s BC 110s BC 100s BC 90s BC 80s BC 70s BC 60s BC 50s BC 40s BC Years: 95 BC 94 BC 93 BC 92 BC 91 BC 90 BC 89 BC 88 BC 87 BC 86 BC 85 BC Events The Etruscans are granted Roman he estimated the astronomical unitThe astronomical unit AU is a unit of distance, approximately equal to the mean distance between Earth and Sun. The currently accepted value of the AU is 149,597,870,691+-30 metres (about 150 million kilometres or 93 million miles). Earth's orbit is not a to be a0/rE = 9893, what was still for a 1/2 too small. He measured the size of the SunThe Sun (also called Sol is the star in our solar system. Planet Earth orbits the Sun. Other bodies that orbit the Sun include other planets, asteroids, meteoroids, comets and dust. Not all objects passing through the solar system have been orbitally capt, which was greater and more accurate than one proposed by other Greek astronomers and AristarchusAristarchus ( 310 BC circa 230 BC) was a Greek astronomer and mathematician, born in Samos, Greece. He is the first recorded person to propose a heliocentric model of the solar system, placing the Sun, not the Earth, at the center of the known universe (h. He used EratosthenesEratosthenes ( 276 BC 194 BC) was a Greek mathematician, geographer and astronomer with (probably) Chaldean origins. He was born in Cyrene (now Shahhat, Libya) and he died in Ptolemaic Alexandria. He is noted for devising a system of latitude and longitud' method and measured EarthEarth also known as the Earth or Terra is the planet on which we live, the third planet outward from the Sun. It is the largest of the solar system's terrestrial planets, and the only planetary body that modern science confirms as harbouring life. The pla's circumference from the position of the star Canopus. His value was 240,000 stadia.
He wanted to master the whole knowledge of that time, similar as Aristotle or Eratosthenes did.
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Astronomers
