An Etymological Dictionary of Astronomy and Astrophysics

An instrument for comparing two photographs of the same stellar field, taken at different times, by quickly alternating from one to the other.
The purpose of the comparison is to detect subtle changes in the position or brightness of the stars.

Etymology (EN): → blink; → comparator.

Etymology (PE): Hamsanjgar, → comparator; možeš noun from možidan, → blink.