DIY guide
https://asd.gsfc.nasa.gov/archive/hubble/a_pdf/news/SM2-MediaGuide.pdf
I forgot the guidance cameras. The gyros keep Hubble on-track during slewing and while not observing. During observations, the telescope is kept on target by two guidance cameras. Those lock on to a star in the general direction of the main tube and direct the telescope's motion controls to keep the star centered in the field of view.
I forgot the guidance cameras. The gyros keep Hubble on-track during slewing and while not observing. During observations, the telescope is kept on target by two guidance cameras. Those lock on to a star in the general direction of the main tube and direct the telescope's motion controls to keep the star centered in the field of view.
