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150 BC | Jupiter moons, Astronomy, Jupiter
an old black and white drawing of a man with long hair, wearing a turban
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150 BC

150 years BC, Hipparchus measures the length of a year with an accuracy of 6 minutes. He makes a list of the positions of the bright stars and after observing the unequal duration of the seasons, he states that the orbit of the sun around the earth is elliptical. (Geocentric model) #nasa #astronomy #astronomer #greek #hipparchus #length #year #geocentric #season #sun #earth #elliptical #star #mohammadhosseinsalimi_1 @nasa @EuropeanSpaceAgency
MohammadHossein_Official_1
Mohammad Hossein Salimi

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