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	mads.xsd"><authority><topic authority="https://r020.com.ar/tematres/demo/">Fenòmens astronòmics</topic></authority><related type="narrower"><topic>Eclipsi</topic></related><related type="narrower"><topic>Forats negres</topic></related><related type="narrower"><topic>Gran cometa</topic></related><related type="narrower"><topic>Moviment polar</topic></related><related type="narrower"><topic>Núvols intergalàctics</topic></related><related type="narrower"><topic>Oscil·lacions estel·lars</topic></related><related type="narrower"><topic>Pluja d&apos;estrelles</topic></related><related type="narrower"><topic>Rotació de la terra</topic></related><related type="narrower"><topic>Trànsit astronòmic</topic></related><related type="broader"><topic>Tesaurus Astronomia (TRESAURUS)</topic></related></mads>