▁Chor r ill os , ▁Chile ▁ ▁Anto f ag asta ▁ ▁Val par ais o ▁ ▁Chor r ill os ▁District , ▁Lima , ▁Peru ▁Chor r ill os , ▁Peru , ▁a ▁southern ▁sub urb ▁of ▁Lima ▁ ▁Other ▁ ▁Association ▁Chor r ill os ▁football ▁club ▁in ▁Chor r ill os , ▁Lima ▁Battle ▁of ▁Chor r ill os ▁in ▁the ▁War ▁of ▁the ▁Pacific , ▁around ▁Chor r ill os , ▁Lima ▁ ▁Chor r ill os ▁Military ▁School ▁in ▁Chor r ill os , ▁Lima ▁Sport ▁Chor r ill os ▁football ▁club ▁in ▁Pi ura , ▁Peru <0x0A> </s> ▁Astronom ical ▁spect ro sc opy ▁is ▁the ▁study ▁of ▁astronom y ▁using ▁the ▁techniques ▁of ▁spect ro sc opy ▁to ▁measure ▁the ▁spectrum ▁of ▁elect romagnet ic ▁radiation , ▁including ▁visible ▁light ▁and ▁radio , ▁which ▁radi ates ▁from ▁stars ▁and ▁other ▁cel est ial ▁objects . ▁ ▁A ▁stell ar ▁spectrum ▁can ▁reve al ▁many ▁properties ▁of ▁stars , ▁such ▁as ▁their ▁chemical ▁composition , ▁temperature , ▁density , ▁mass , ▁distance , ▁lum inos ity , ▁and ▁relative ▁motion ▁using ▁Do pp ler ▁shift ▁measurements . ▁Spect ro sc opy ▁is ▁also ▁used ▁to ▁study ▁the ▁physical ▁properties ▁of ▁many ▁other ▁types ▁of ▁cel est ial ▁objects ▁such ▁as ▁plan ets , ▁ne b ula e , ▁galaxies , ▁and ▁active ▁gal actic ▁nuc lei . ▁ ▁Background ▁ ▁Astronom ical ▁spect ro sc opy ▁is ▁used ▁to ▁measure ▁three ▁major ▁bands ▁of ▁radiation : ▁visible