Optical instruments are sometimes mounted on an articulated, powered appendage for the spacecraft bus called a scan System, which points in commanded Instructions, making it possible for optical observations to get taken independently on the spacecraft's Angle. This is the situation on Voyager and Galileo. Most more recent spacecraft are https://kylervtiuh.thezenweb.com/the-2-minute-rule-for-fall-arrest-inertia-reel-66625106