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Under Geodetic Astronomy or Geodetic Astronomy is meant those methods of geodesy and astrometry at which measurements to celestial bodies and other extraterrestrial made goals and the coordinate systems of Spherical Astronomy be used.

The central task is the determination of vertical directions (vertical deviations) and other directions of the earth's space in a fixed reference system . The positions (" places ") of the celestial bodies are set or to be determined in a celestial or celestial coordinate system . The relationship between the two systems is related to the position of the earth in space , especially the earth's rotation .

Possible stars

In addition, measurements of artificial earth satellites ( satellite geodesy ) and quasars ( cosmic geodesy ) are used, because astronomical geodesy and astrometry overlap somewhat.

Various methods of distance measurement and the most precise time measurement are also used.

Significance of astro-geodetic methods

The goals of these measurements are very diverse:

Measuring instruments

The measuring instruments used are - as in other areas of geodesy  - mainly theodolites , tachymeters and quartz clocks , earlier also vacuum pendulum clocks and precise chronometers .

In addition, small to medium-sized special instruments from the field of astronomy and astrometry that work either visually , photographically or optoelectronic :

and (overlapping with satellite geodesy and geophysics ) some of their measurement methods, e.g. B. with

Well-known scientists

Astrogeodesy owes important developments to u. a. the following researchers (in approximately chronological order):

See also