Four of these are used on two instruments, the UCSD Faint Object Spectrometer (FOS), and the Goddard High Resolution Spectrometer (GHRS), on the Hubble Space Telescope (HST).
A telescope is used to make objects in space appear closer.
A telescope<>is used<>to make objects in space appear closer$$$A telescope<>to make<>objects in space appear closer$$$objects in space<>appear<>