He then enrolled at Ghent University and obtained a degree in theoretical astronomy.

This is a mixture of observational astronomy, over the entire electromagnetic spectrum, computational theoretical astronomy, and analytic theoretical research.

He attained the Doctorate in 1884 and the Habilitation in 1910 for theoretical astronomy.

In the field of theoretical astronomy, Brorsen calculated the perihelia of comet and planet orbits.

The obvious fact is that theoretical astronomy cannot (and does not try) to predict the position, size and temperature of every star in the heavens.

Thanks to his works on theoretical astronomy, at the age of 36 he became the youngest member of the Polish Academy of Sciences.

He began teaching theoretical astronomy and geodesics at the University of Vienna in 1866.

The result reported yesterday is a landmark for observational and theoretical astronomy.

The two fields complement each other, with theoretical astronomy seeking to explain the observational results, and observations being used to confirm theoretical results.

Observatory staff carry out theoretical and observational astronomy as well as designing and constructing astronomical instrumentation.