Tycho Brahe - the founder of modern observing astronomy.
Tycho Ottesen Brahe (December 14, 1546 - October 24, 1601) was a great Danish astronomer, considered the founder of modern observing astronomy. He was born on Knudstrup Castle outside Landskrona in the then Danish Scania, and died in Prague.
18 October 2009
The life of Tycho Brahe
On the 21st of August 1560 the then fifteen year old Tycho Brahe observed a solar eclipse and it became the decisive experience...
His research has been on astrometry, i.e. the measurement of positions, motions and distances of stars., and since 1960 he has developed photoelectric astrometry.
He designed the ESA satellite Hipparcos in 1975, and proposed in 1981 a new experiment on Hipparcos resulting in the Tycho-2 Catalogue of the 2.5 million brightest stars. In 1992 he proposed a new satellite Roemer, where the use of CCDs meant 100,000 times higher efficiency than with Hipparcos. This resulted in the adoption of a new ESA satellite, Gaia, to be launched in 2012.