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: These instruments are two telescopes, with the objectives spaced prehaps 18 apart, each directed to an eyepiece via mirrors or prisms.
sentence2: A telescope is used to make objects in space appear closer.
question: What instrument is used to make objects in space appear closer?