How do we know how far away proxima centauri is?

Proxima Centauri, the closest known star to the Sun, is located about 4.24 light-years away, a distance determined through parallax measurements. By observing the star's apparent position against more distant background stars from different points in Earth's orbit, astronomers can calculate its distance using trigonometry. This method relies on the principle that nearby objects appear to shift position relative to farther objects due to the observer's movement. These measurements have been refined over time with advances in telescopes and observational techniques.