Tycho Brahe

T J Osler

Tycho Brahe, (14 December 1546 –24 October 1601 ), was a Danish nobleman known for his accurate and comprehensive 

astronomical and planetary observations.

• Tycho first built Uraniborg in 1576 (with a laboratory for his alchemical experiments in its cellar) and then Stjerneborg in 1581.  

• Unusual for the time, Tycho established the Uraniborg as a research centre where almost 100 students and artisans had worked from 1576 to 1597.

Uraniborg 

Tycho was the preeminent observational astronomer of the pre-telescopic period, and his observations of stellar and 

planetary positions achieved unparalleled accuracy for their

time.

Tycho's Geo-heliocentric Astronomy

Drawing of Cassipeia, with the position of the stars. "Nova Stella", the brightest is marked as "I".