Famous astronomers: How these scientists shaped astronomy

Throughout human history, astronomers have helped people understand what they see in the night sky. These famous astronomers — many of them great scientists who mastered many fields — explained space phenomena with varying degrees of accuracy. 

Over the centuries, a geocentric view of the universe — with Earth at the center of everything — gave way to the proper understanding we have today of an expanding universe in which our galaxy is but one of billions. On this list are some of the most famous scientists from the early days of astronomy through the modern era, and a summary of some of their achievements.

Eratosthenes of Cyrene