born in 1564 and died in 1642

formulated basic law for falling bodies

http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Galileo.html

born in 1546 and died in 1601

he gave lectures on astronomy to colleges

http://galileo.rice.edu/sci/brahe.html

born in 1473 and died in 1543

showed the view of earth in daily motion

http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Copernicus.html

Henriatta Levitt was born in 1868 and died in 1921

she developed standard photographic measurements

1914 to 2006

got info about radiation belts circling earth

http://history.nasa.gov/sputnik/vanallen.html

1852 to 1931

career in physics, did stuff with light

http://www.aip.org/history/gap/Michelson/Michelson.html

born 1502 died 1585

changed the european calender

http://www.answers.com/topic/pope-gregory-xiii