Tycho Brahe (1546 - 1601), Danish nobleman and astronomer: significant observations without a telescope.
Galileo Galilei (1564 - 1642), Italian physicist, mathematician and astronomer: by constructing telescopes he greatly enlarged humanity's vision and conception of the universe.
Johannes Kepler (1571 - 1630), German mathematician, astronomer and astrologer: the originator of the Kepler's laws.
William Herschel (1738 - 1822), German-British astronomer: discovered the planet Uranus and infrared radiation.
Clyde Thombaugh (1906 - 1997), American astronomer: the discoverer of dwarf planet pluto.
Nicholas Copernicus (1473 - 1543), Polish astronomer: discovered that the earth revolved annually around the sun.
Edmund Halley (1656 - 1742), English astronomer and geophysicist: the first to calculate a comet's orbit.
Maria Mitchell (1818 - 1889), American astronomer: the first American woman to work as a professional astronomer; discovered the "Miss Mitchell's Comet".
Claudius Ptolemy (90 AD - 168 AD), ancient Egyptian astronomer and mathematicians: most of his astronomical theories were later proved wrong.
Sir Isaac Newton (1642 - 1727), English physicist, mathematician and astronomer: contributed to the unification of physics and astronomy.
Edwin Hubble (1889 - 1953), American astronomer: the first that detected that the universe is expanding.
Astronomers - Elementary School / Middle School Level
Hall of Astronomers - Enchanted Learning
Windows to the Universe - NASA
Hear the Space Pioneers: To The Moon - PBS
Famous Astronomers - space.com
7 Famous Astronomers You Should Know, And Why - Discovery
Astronomers - Middle School /High School Level
The Encyclopedia of Astrobiology, Astronomy, and Spaceflight - David J. Darling
Astronomers - biography.com
List of astronomers - Wikipedia
Astronomers - High School Level
The Bruce Medalists
Famous Astronomers and Astrophysicists
Astronomers - Cartage
Deep Sky Astronomers
Astronomers - High School / College Level
Cosmology and Cosmologists - The Japan Aerospace Exploration Agency (JAXA)
History of Astronomy: Persons - Bonn University
Infrared Astronomy Timeline - Cool Cosmos
A Brief History of High-Energy Astronomy - NASA
Star Quest - Thinkquest
Astronomers and Astronomy on Stamps and Images
Sci-Philately - Buffalo University
Meteorite Stamps and Coins
Space and Astronomy Stamps
Celebrating 40 years of Yuri Gagarin - The Astro Space Stamp Society
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