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

Stephen Hawking

born in 1942

he was a very smart genius

http://www.imdb.com/name/nm0370071/

He wrote Cosmos and Billions and Billions born 1934, died 1996 http://www.imdb.com/name/nm0755981/biohttp://www.imdb.com/name/nm0755981/bio

Ptolemy was born in 65 A.D. and died in 165 A.D.

Very influental greek

Made the book Almagest

http://www-groups.dcs.sand.ac.uk/~history/Biographies/Ptolemy.html

Aristotle was around in the 4th century

His teachings are called the Arganon

http://www.philosophypages.com/ph/aris.htm

Hipparchus 190 to 121 B.CE.

He discovered the precession of the equinoxes

http://www-groups.dcs.st-and.ac.uk/~history/Biographies/Hipparchus.html

astronomy

this is hard