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mads.xsd"><authority><topic authority="http://roble.intecca.uned.es/tematres/lem/">Astronomía esférica</topic></authority><related type="narrower"><topic>Astronomía geodésica</topic></related><related type="narrower"><topic>Astronomía náutica</topic></related><related type="other"><topic>Coordenadas geográficas</topic></related><related type="other"><topic>Astrometría</topic></related><related type="other"><topic>Tiempo</topic></related><related type="other"><topic>Latitud</topic></related><related type="other"><topic>Geodesia</topic></related><related type="broader"><topic>Astronomía</topic></related><variant type="other"><topic>Astronomía práctica</topic></variant></mads>