Who was Hipparchus and what did he do?

Answer 1

He was an ancient Greek astronomer. He made planetary tables that could predict where planetary bodies would appear in the sky at all times.

Answer 2

Hipparchus was an ancient Greek astronomer and mathematician who lived during the 2nd century BC. He is often referred to as the father of trigonometry and is known for his work in measuring and cataloging the positions of stars. Hipparchus also made significant advancements in the study of Astrology and is credited with developing the first comprehensive star catalog.