astrometric measurement

Astrometric measurement is the method used by astronomers to determine the positions and movements of celestial objects, such as stars and planets. By precisely measuring the angles and distances between these objects, scientists can track their positions over time, revealing information about their motion, distance, and even their mass. This data is crucial for understanding the structure and dynamics of our universe, helping us learn about the motion of stars within our galaxy and the behavior of distant galaxies. Essentially, astrometry provides a cosmic map that guides our exploration of the universe.