International Celestial Reference Frame
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International Celestial Reference Frame
[‚in·tər¦nash·ən·əl si¦les·chəl ′ref·rəns ‚frām] (astronomy)
A celestial reference frame made up from the positions of approximately 400 extragalactic radio sources observed with very long baseline interferometry.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.