International Celestial Reference Frame

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.