ASTRONOMY
DATE(S) TOPIC - a short history (CLICK THE TITLE BELOW)
WIKI
1889-1953 Edwin Hubble: showed that there are MILLIONS of galaxies (also Swan Leavitt & Jump Cannon)  
1811-1877 Urbain Le Verrier - predicted the existence of planet Nepture purely by using maths
1571-1630 Johannes Kepler - used Brahe's measurements to accurately describe planetary motion
1564-1642 Galileo Galilei - often called the father of observational astronomy
1546-1601 Tycho Brahe - studied and meticulously recorded the movement of the planets