- Arabic astronomy
Historical Sources for the history of Arabic and Islamic Astronomy
http://www.al-kawn.com/astronomy_studies.htm
(Added: Sat Oct 26 2002)
- Copernican Model: A Sun-Centered Solar System
The Earth-centered Universe of Aristotle and Ptolemy held sway on Western thinking for almost 2000 years. Then, in the 16th century a new idea was proposed by the Polish astronomer Nicolai Copernicus (1473-1543).
http://csep10.phys.utk.edu/astr161/lect/retrograde/copernican.html
(Added: Sun Oct 27 2002)
- Copernicus
Copernicus, Nicholaus (1473-1543) became interested in astronomy and published an early description of his "heliocentric" model of the solar system in Commentariolus (1512). This page is part of Eric Weisstein's World of Scientific Biography.
http://scienceworld.wolfram.com/biography/Copernicus.html
(Added: Sun Oct 27 2002)
- Copernicus
Copernicus postulated that placing the Sun in the center with all of the planets, including the Earth, moving in circular orbits around the Sun would explain the observed planetary motions, particularly retrograde motion, in the context of a much simpler model.
http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Copernicus.html
(Added: Sat Oct 26 2002)
- Galileo
A web resource on the life and works of Galileo Galilei (1564-1642). Galileo used the telescope (he didn't invent it!) to make observations which refuted the old Earth-centered model and confirmed that the planets orbited the Sun.
http://es.rice.edu/ES/humsoc/Galileo/
(Added: Sat Oct 26 2002)
- Galileo Galilei
This web site give some biographical information about Galileo as well as a list of his observations.
http://galileo.imss.firenze.it/museo/b/egalilg.html
(Added: Sun Oct 27 2002)
- Galileo: the Telescope and the Laws of Dynamics
Galileo Galilei (1564-1642) was a pivotal figure in the development of modern astronomy, both because of his contributions directly to astronomy, and because of his work in physics and its relation to astronomy. He provided the crucial observations that proved the Copernican hypothesis, and also laid the foundations for a correct understanding of how objects moved on the surface of the earth (dynamics) and of gravity.
http://csep10.phys.utk.edu/astr161/lect/history/galileo.html
(Added: Sun Oct 27 2002)
- Life of Nicolaus Copernicus
The events of the life of Nicolaus Copernicus.
http://www.frombork.art.pl/Ang11.htm
(Added: Sun Oct 27 2002)
- Renaissance Astronomy Timeline
This is a list of significant events in astronomy that took place from 1543 to 1683.
http://www.geocities.com/CapeCanaveral/1612/renaiss.html#Astronomy%20of%20Renaissance
(Added: Sat Oct 26 2002)
- The Copernican Model: A Sun-Centered Solar System
Mixes biographical details with an explanation of the Polish astronomer's main scientific ideas. Includes illustrative models.
http://csep10.phys.utk.edu/astr161/lect/retrograde/copernican.html
(Added: Sun Oct 27 2002)
- The Observations of Tycho Brahe
A Danish nobleman, Tycho Brahe (1546-1601), made important contributions by devising the most precise instruments available before the invention of the telescope for observing the heavens.
http://csep10.phys.utk.edu/astr161/lect/history/brahe.html
(Added: Sun Oct 27 2002)
- The Titius-Bode Law
Johann Titius, a German astronomer, discovered a numerical relationship describing the relative distances of the then-known planets from the sun. Another German astronomer, Johann Bode, popularized the relationship and, as is often the way of science, became associated with it.
http://www.mira.org/fts0/planets/091/text/txt001x.htm
(Added: Sat Oct 26 2002)
- Tycho Brahe
Tycho Brahe made precise observations of planetary positions over a long period of time and handed them over to a brilliant (and obsessive compulsive) mathematician/mystic/astronomer named Johannes Kepler.
http://es.rice.edu/ES/humsoc/Galileo/People/tycho_brahe.html
(Added: Sat Oct 26 2002)
- Tycho Brahe
Tycho Brahe(1546-1601) was a Danish astronomer who set out to make accurate observations in order to be able to determine whether the Ptolemaic or Copernican system was the more correct. This page is part of Eric Weisstein's World of Scientific Biography.
http://scienceworld.wolfram.com/biography/Brahe.html
(Added: Sun Oct 27 2002)
- Understanding Retrograde Motion
One phenomenon that ancient astronomers had difficulty explaining was the retrograde motion of the planets. Over the course of a single night, a planet will move from East to West across the sky, like any other celestial object near the ecliptic.
http://www.lasalle.edu/~smithsc/Astronomy/retrograd.html
(Added: Sun Oct 27 2002)
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