Webb's Fine Guidance Sensor provides a preview of its power

This engineering test image captured by Canada's Fine Guidance Sensor (FGS) on Webb, in 72 exposures over 32 hours in May 2022, provides a unique preview of the power of the space observatory. 

While Webb's four science instruments will ultimately reveal the telescope's new view of the universe, the FGS is the one element that will be used in every single Webb observation over the course of the mission's lifetime. (Credits: Canadian Space Agency, NASA, FGS team)