What was tycho brahe model of solar system?
Roughly, the Tycho Brahe model of the solar system was something between the ptolemic geocentric model of the solar system and the copernican heliocentric model. The sun still revolved around the earth but all other planets revolved around the sun. Interestingly, it was Tycho’s pupil Kepler, that refined the Copernican model to include elliptical orbits (until then, orbits were assumed to be perfect circles).