Ptolemy would have made his observations in Egypt probably Alexandria around AD120 up to his death in AD168.
Im thinkin that it was made when he decided to look up at the sky one night and decided he would make an astronomical observation. idk just that's how i would make an oservation of the sky. [Rosco P. Coltrain]
he studied at barnes and noble
Ptolemy
late 1500's
The sumerians
The Babylonians did the first recorded astronomical observations and for this they also invented the idea of angles and then decided to divide a circle into 360 degrees.
Robert R. Newton has written: 'Ancient astronomical observations and the accelerations of the earth and moon' -- subject(s): Acceleration (Mechanics), Ancient Astronomy, Eclipses 'The Origins of Ptolemy's Astronomical Parameters (Technical Publication / Center for Archaeoastronomy)' 'The moon's acceleration and its physical origins' -- subject(s): Acceleration (Mechanics), Moon, Observations, Origin
ptolemy
Astronomical observations.
By being gay.
An observatory.