noun
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astronomy a measure of the distance, r , of a celestial object too far away to show measurable parallax. It is given by m – M = 5 log( r /10), where m is its apparent magnitude (corrected for interstellar absorption) and M is its absolute magnitude
"Collins English Dictionary — Complete & Unabridged"
2012 Digital Edition
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
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