8 links
Astronomiæ Instauratæ Mechanica
sil.si.edu
Digital edition of orignal book, with illustrations and introduction.
Eric Weisstein's Treasure Trove of Scientific Biography: Brahe, Tycho
treasure-troves.com
Short article with references.
The Noble Dane: Images of Tycho Brahe
mhs.ox.ac.uk
An exhibition at the Museum of the History of Science, Oxford.
Tycho Brahe
nada.kth.se
About his achievements, life and world system. From the Swedish society Tycho Brahes Glada Vänner.
Tycho Brahe - official website
tychobrahe.com
About his life and scientific work. Presented by the city of Landskrona.
Tycho Brahe and Johannes Kepler
galileoandeinstein.physics.virginia.edu
Short biographies. Lecture notes from the course "Galileo and Einstein".