= Star tracker
{wiki=Star_tracker}
A star tracker is an optical device used primarily in space applications, particularly in spacecraft navigation and attitude determination. It works by observing the positions of stars relative to one another, allowing a spacecraft to determine its orientation (attitude) in three-dimensional space. \#\#\# Key Functions and Characteristics: 1. **Astronomical Reference**: Star trackers utilize the positions of stars, which are generally stable points in the sky, as reference points to ascertain the spacecraft's orientation.
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