1. Tycho Brahe T J Osler

2. Tycho Brahe, (14 December 1546 –24 October 1601 ), was a Danish nobleman known for his accurate and comprehensive astronomical and planetary observations.noblemanastronomical and planetary

4. Tycho first built Uraniborg in 1576 (with a laboratory for his alchemical experiments in its cellar) and then Stjerneborg in 1581. UraniborgalchemicalStjerneborg Unusual for the time, Tycho established the Uraniborg as a research centre where almost 100 students and artisans had worked from 1576 to 1597.

5. Uraniborg

8. 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.stellarplanetary

10. Tycho's Geo-heliocentric Astronomy

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