Solar System (Subscribe)
Links
The Planet Mars: A History of Observation and Discovery
http://www.uapress.arizona.edu/onlinebks/mars/contents.htm
On-line version of the book by William Sheehan.
Orbits and Gravitation
http://www-groups.dcs.st-and.ac.uk/~history/HistTopics/Orbits.html
The development of the mathematics of planetary motion.
Neptune and Pluto
http://www-groups.dcs.st-and.ac.uk/~history/HistTopics/Neptune_and_Pluto.html
Mathematical discovery of planets
Is Mars Habitable?
http://www.wku.edu/~smithch/wallace/S730.htm
A. R. Wallace's 1907 critique of Lowell's Book "Mars and Its Canals"
Exploring The Planets-Discovery
http://www.nasm.si.edu/ceps/etp/discovery/etpdiscovery.html
The five known in antiquity, three more since the telescope, and Ceres.
Asteroid Discovery Circumstances
http://ssd.jpl.nasa.gov/dc_home.html
For each minor planet: Where and when found, and by whom.