<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">astronomical instruments</topic></authority><related type="narrower"><topic>astrolabes</topic></related><related type="narrower"><topic>cross-staffs</topic></related><related type="narrower"><topic>octants</topic></related><related type="narrower"><topic>sextants</topic></related><related type="narrower"><topic>orreries</topic></related><related type="narrower"><topic>astrodictums</topic></related><related type="narrower"><topic>astrometers</topic></related><related type="narrower"><topic>astronomical instrument cases</topic></related><related type="narrower"><topic>astronomical mirrors</topic></related><related type="narrower"><topic>astronomical quadrants</topic></related><related type="narrower"><topic>astronomical telescopes</topic></related><related type="narrower"><topic>astropatrotometers</topic></related><related type="narrower"><topic>astroscopes</topic></related><related type="narrower"><topic>azimuth instruments</topic></related><related type="narrower"><topic>coronagraphs</topic></related><related type="narrower"><topic>cosmolabes</topic></related><related type="narrower"><topic>eclipsareons</topic></related><related type="narrower"><topic>cyanometers</topic></related><related type="narrower"><topic>dipleidoscopes</topic></related><related type="narrower"><topic>heliometers</topic></related><related type="narrower"><topic>helioscopes</topic></related><related type="narrower"><topic>meridian circles</topic></related><related type="narrower"><topic>meteoroscopes</topic></related><related type="narrower"><topic>magnetographs</topic></related><related type="narrower"><topic>objective prisms</topic></related><related type="narrower"><topic>planetarium projectors</topic></related><related type="narrower"><topic>radio interferometers</topic></related><related type="narrower"><topic>selenotropes</topic></related><related type="narrower"><topic>siderostats</topic></related><related type="narrower"><topic>spectroheliographs</topic></related><related type="narrower"><topic>spheroscopes</topic></related><related type="narrower"><topic>telengiscopes</topic></related><related type="narrower"><topic>telepolariscopes</topic></related><related type="narrower"><topic>telespectroscopes</topic></related><related type="other"><topic>astronomers</topic></related><related type="other"><topic>astronomy</topic></related><related type="broader"><topic>scientific instruments</topic></related><variant type="other"><topic>astronomical tools</topic></variant><variant type="other"><topic>astronomical tools and equipment</topic></variant><variant type="other"><topic>equipment, astronomical</topic></variant><variant type="other"><topic>instruments, astronomical</topic></variant><variant type="other"><topic>tools, astronomical</topic></variant><variant type="other"><topic>astronomical equipment</topic></variant><variant type="other"><topic>astronomical instrument</topic></variant> <note xml:lang="en"><![CDATA[ Tools and equipment used in the observation, measurement, and recording of objects and events outside of the earth's atmosphere. ]]></note></mads>