Hipparchus
[hi'pa:kəs]
Definition
(noun.) Greek astronomer and mathematician who discovered the precession of the equinoxes and made the first known star chart and is said to have invented trigonometry (second century BC).
Typed by Clarissa--From WordNet
Examples
- Hipparchus made the first attempt to catalogue and map the stars with a view to checking any changes that might be occurring in the heavens. H. G. Wells. The Outline of History_Being a Plain History of Life and Mankind.
- Ptolemy drew up a catalogue of 1080 stars based on the earlier work of Hipparchus. Walter Libby. An Introduction to the History of Science.
- To Hipparchus and Ptolemy we owe also the beginnings of the science of trigonometry. Walter Libby. An Introduction to the History of Science.
Typed by Borg