astronomical frame of reference
noun Physics.
a frame of reference in which the sun or center of mass of the universe is fixed and which does not rotate with respect to the fixed stars.
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Nearby words
astronomer, astronomer royal, astronomical, astronomical clock, astronomical distance, astronomical frame of reference, astronomical refraction, astronomical telescope, astronomical triangle, astronomical twilight, astronomical unit
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019