Astronomers

Le Verrier, Urbain - The French astronomer whose mathematical predictions led to the discovery of Neptune.
http://starchild.gsfc.nasa.gov/docs/StarChild/whos_who_level2/leverrier.html

Tombaugh, Clyde - The discoverer of Pluto started out as an amateur who built his own telescopes.
http://starchild.gsfc.nasa.gov/docs/StarChild/whos_who_level2/tombaugh.html

Halley, Edmond - Sir Edmond Halley did more than calculate the return of the comet named after him. Learn more about his work with the motion of stars, and his study of Mercury and Venus.
http://sirius.phy.hr/~dpaar/fizicari/xhalley.html

Herschel, Caroline - A short biography of the first woman to discover a comet.
http://starchild.gsfc.nasa.gov/docs/StarChild/whos_who_level2/herschel.html

Ptolemy - An astronomer, mathematician and geographer who lived in Alexandria, Egypt. We know very little more of his life. He classified the Greek geocentric view of the universe, and calculated the apparent motions of the planets.
http://space.about.com/cs/astronomerbios/a/ptolemybio.htm

Adams, John Couch - The first to mathematically predict an unknown planet, his calculations were ignored and someone else discovered Neptune.
http://starchild.gsfc.nasa.gov/docs/StarChild/whos_who_level2/adams.html

Bell Burnel, Jocelyn - The radio astronomer who discovered what turned out to be neutron stars, also called pulsars.
http://starchild.gsfc.nasa.gov/docs/StarChild/whos_who_level2/bell.html

StarChild: Dr. Stephen Hawking - Tells about the physicist known for his study of black holes.
http://starchild.gsfc.nasa.gov/docs/StarChild/whos_who_level2/hawking.html

Famous Astronomers - Features profiles of various astronomers of fame, from Galileo to Ptolemy.
http://library.thinkquest.org/23830/astronomers.htm