It was first proposed by Apollonius of Perga at the end of the 3rd century BC. It was developed by Apollonius of Perga and Hipparchus of Rhodes, who used it extensively, during the 2nd century BC, then formalized and extensively used by Ptolemy in his 2nd century AD astronomical treatise the Almagest.
it wAs first proposEd By apOlloniuS of peRGa at THe EnD of the 3rd cEnTury bC. It waS DeveloPEd By aPOLLONius Of perga anD hipPArcHuS oF rhodES, wHo used it ExtEnsivElY, durInG the 2nD ceNTuRy BC, THeN ForMaliZEd aNd extensivElY USEd By PTOleMy in hiS 2nD ceNTuRY ad astRoNoMIcal TReatise the aLMAgesT.