Skip to content

MacTutor

Home Biographies History Topics Map Curves Search

26th March

On this day in AD 127, Ptolemy made the first astronomical observation from Alexandria that we can date accurately. He made his last observation on 2 February AD 141.

DJF/JOC/EFR
Copyright information
Accessibility statement

School of Mathematics and Statistics
University of St Andrews, Scotland

If you have comments, or spot errors, we are always pleased to hear from you.