-
Feb 19, 1473
Nicholas Copernicus
formulated a helicenter model of universe -
Dec 4, 1546
tycho brahe
accurate and comprehensive astronomicial -
Feb 15, 1564
galileo galilie
a stronimical teliscope -
Dec 27, 1571
johannes kepler
kinematics -
giovanni cassini
discovered 4 satelites for saturn -
sir isaac newton
universal laws of motion -
edmond haley
haleys commet -
charles messier
publishing on asronomical catalogue -
william herschel
discovered the planet uranus -
anne jumo cannon
harvard classification scheme -
albert einstein
theory of relativity -
edwin hubble
extagalactic astronomy -
frank drake
creator of arecibo message -
carl sagan
spread science through writings -
stephen hawking
black holes producing radiation
