Niels Bohr Institute > Who, What, When > > Surveying the sky
Danish astrometry from 1925 to today
Surveying the sky
An astrometric experiment in 1925 was the beginning of a development, which astronomer Erik Høg, Associate Professor Emeritus, took part in for 50 years. A scientific highlight is the star catalogue Tycho-2 from the year 2000, which describes the positions and movements of 2.5 million stars and is now absolutely essential to controlling satellites and for astronomical observations.
23. november 2010
A 400 year era
Our most famous astronomer, Tycho Brahe was directly under the king, who let him build an observatory on the island Hven in Øresund.
23. november 2010
Astrometry
Astrometry is the branch of astronomy that Tycho Brahe practised by measuring the position of stars.
23. november 2010
Development of photoelectric astrometry
Erik Høg, an astronomer at the University of Copenhagen, worked for 15 years at the observatory in Hamburg.
23. november 2010
Astrometry in space
In 1975 ESA asked Erik Høg whether he would take part in the development of a satellite for astrometry.
23. juni 2010
The Gaia Mission - a new tiger leap in astrometry
Only one astrometric satellite has been launched, Hipparcos, and its observations from 1989-93 brought a tiger leap...
Email: