The Vixen Optics Polarie is Bresser’s solution as a standalone unit, which was tested as a standalone unit for the purposes of this review. Why do astrophotographers use star trackers? Over the course ...

Star trackers and associated sensor systems are fundamental instruments for attitude determination in both spacecraft and aerial vehicles. By utilising celestial objects as reference points, these ...

NASA's Europa Clipper captured this image of a starfield—and the planet Uranus—on Nov. 5, 2025, while experimenting with one of its two stellar reference units. These star-tracking cameras are used ...