sentence2_structure: A telescope<>is used<>to make objects in space appear closer$$$A telescope<>to make<>objects in space appear closer$$$objects in space<>appear<>
sentence1: Graphical models of the Hubble Space Telescope (HST) and a large number of digitized close-out photographs of the instrument are available.
sentence2: A telescope is used to make objects in space appear closer.
question: What instrument is used to make objects in space appear closer?