(NB. Blue links are links within the current page. Purple links are external links to other web sites. Pale Green links are are to other pages at this site.)
General
Einstein, Albert (1879-1955)
Galileo Galilei (1564-1642)
Hipparchus (c. 180-125 BC)
Hubble, Edwin P. (1889-1953)
Jansky, Karl (1905-1950)
Kepler, Johannes (1571-1630)
Newton, Issac (1642-1727)
Ptolemy (2nd Century AD)
Shapley, Harlow (1885-1972)
Hawking, Stephen (1942-1998+)

Nicolaus Copernicus was a Polish astronomer who worked on the heliocentric theory of planetary motion and who showed his dissatisfaction toward the Ptolemaic System

LINKS
A short biography of Nicolaus Copernicus with a picture
http://www.sjsu.edu/depts/Museum/copern.html

A biogrpahy of Nicolaus Copernicus and his theories
http://www.connect.net/ron/copernicus.html

Information on his life and work
http://www.intelligentchild.com/astronomy/copernicus.html

Info. on the life on Nicolaus Copernicus
http://faust.irb.hr/~dpaar/fizicari/xcopern.html

The Copernican Model...loads of diagrams on the work of Copernicus (incl. animated ones) and information on his work
http://csep10.phys.utk.edu/astr161/lect/retrograde/copernican.html

A timeline of events that occured after the death of Copernicus, which he influenced
http://www.phys-astro.sonoma.edu/people/faculty/tenn/CopernicanRevolution.html

The Copernican System described including diagrams from his work
http://es.rice.edu/ES/humsoc/Galileo/Things/copernican_system.html

11 More Nicolaus Copernicus links
http://www.davison.k12.mi.us/academic/tuttle/copern.htm