This is also confirmed by the high number of new detections coming from ground-based and satellite surveys. But double stars are seriously complicating both the observations and the elaboration of theorical models. It frequently happened and still happens that studies of double stars are being neglected in favour of studies of single stars, galactic and extra-galactic research.
Scientists try to understand what processes are going on in the interior of stars.
There exists a panoply of widely differing objects with a variety of possible processes that may complicate the study of such systems. Additional observational constraints are obtained from their spectroscopic or light curve analyses. One can also look for systems with extremely low or high mass values. In the astrometric mode, similar to the detection of astrometric binaries, the reflex motion of the star gravitationally pulled by its planetary system is observed. This technique then provides a direct estimation of the mass of the planets.