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astrometry |
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astrometry: see astronomy astronomy, branch of science that studies the motions and natures of celestial bodies, such as planets , stars , and galaxies ; more generally, the study of matter and energy in the universe at large. ..... Click the link for more information. . astrometry [ə′sträm·ə·trē] (astronomy) The branch of astronomy dealing with the geometrical relations of the celestial bodies and their real and apparent motions. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Astrometric measurements, unlike the Doppler method, determine the orientation of an orbiting body and can therefore gauge its true mass. NASA announced funding for the 5-year mission, known as FAME (Full-sky Astrometric Mapping Explorer), last month. He reanalyzed the movement of Lalande 21185 recorded on photographic plates taken at the observatory between 1930 and 1984, and he tracked the star's motion from 1988 to the present using a photoelectric detector called MAP (Multichannel Astrometric Photometer). |
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