As the World Turned - History of sun-centered astronomy, includes original work of Galileo, Copernicus, others - http://math.dartmouth.edu/~matc/Readers/renaissance.astro/0.intro.html
A Brief History of Cosmology - A review by David Wands of the development of cosmology, starting with the Babylonians. - http://www-groups.dcs.st-and.ac.uk/~history/HistTopics/Cosmology.html
History of Cosmology - An overview from the MacTutor History of Mathematics archive. - http://www-gap.dcs.st-and.ac.uk/~history/HistTopics/Cosmology.html
The Copernican Revolution - Brief historical chronology of the development and acceptance of heliocentricity. - http://www.skyscript.co.uk/copernicus.html
Thomas Aquinas and Big Bang Cosmology - The development of theological implications of scientific work on origin of the universe. - http://www.nd.edu/Departments/Maritain/ti/carroll.htm
Cosmology since 1900 - A timeline with links. - http://www.phys-astro.sonoma.edu/people/faculty/tenn/CosmologySince1900.html
Construction of Cosmology - When and how physical cosmology became a science. - http://www.nd.edu/~histast4/exhibits/papers/kragh.html
The Shapley - Curtis Debate in 1920 - The "great debate" about the scale of the universe and the nature of spiral nebulae. - http://antwrp.gsfc.nasa.gov/diamond_jubilee/debate_1920.html
Inventing the Solar System - Early Greek scientists struggle to explain how the heavens move. - http://www.perseus.tufts.edu/GreekScience/Students/Ellen/EarlyGkAstronomy.html
Flat Earth Historical Thinking - History of the belief that the earth is flat. - http://www.ethicalatheist.com/docs/flat_earth_myth.html