optical astrometry

Optical astrometry is a technique used to measure the precise positions and movements of celestial objects, such as stars or planets, using telescopes and cameras. By capturing detailed images over time, astronomers can determine an object's location, how it moves across the sky, and its distance from Earth. This information helps us understand the dynamics of our universe, including the orbits of planets, the motion of stars, and the structure of our galaxy. Essentially, optical astrometry provides a highly accurate map of celestial objects' positions and motions based on their light captured through telescopes.