What Does FGS Stand For?

FGS stands for Fine Guidance Sensors

Fine Guidance Sensors (FGS) are high-precision instruments used in astronomy and space observation to maintain the stability and accuracy of imaging systems. They function by detecting and correcting any slight movements or changes in the position of a spacecraft or telescope, ensuring that observations are sharp and focused. FGS are essential for long-exposure imaging and for instruments requiring extremely accurate pointing to gather reliable scientific data.