HELP PLEASE!!!!!!!!!!!!!!!!!!!!!! IM TIMED!!!!!!!!!!!! 25 POINTS!!!!!!!!!! PLEASE HELP!!!!!!!!!!
Select the functions that relate to measurement of a light year.
determines the age of space objects
describes the color spectrum of a star
provides a conversion method for units of distance
describes the size of space objects
uses observations of angles of distant objects
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measures luminosity of space objects