astrometry

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“
Like astrometry, radial velocity detects the "wobble" of a star, but it measures Doppler shifts in the star's light caused by its motion towards and away from us.

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Definitions (4)

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  1. noun The scientific measurement of the positions and motions of celestial bodies.

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Examples (25)

  • This interview pr cobra libre: Found in space - The 'blind astrometry bot' analyzes night sky photos on Flickr, determining which part of the sky is depicted and noting heavenly bodies of interest. —  Random feeds from Syndic8.com
  • Some of the star patterns are obscure and would not be detected without something like astrometry. net. —  Brad Ideas - Comments
  • He specialized in astrometry, making very precise measurements of stellar positions and motions and he also calculated the orbits of Sirius and Procyon long before their companions were discovered. —  Universe Today
  • We propose to obtain sufficient astrometry and photometry of 23 TNBs to compute their mutual orbits and system masses and to determine separate primary and secondary colors, roughly tripling the sample for which this information is known, as well as extending it to include systems of two near-equal size bodies. —  SpaceRef - Calendar of Events
  • Furthermore, a detection of Fomalhaut b in 2009 will provide a crucial third epoch for astrometry. —  SpaceRef Top Stories
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Etymologies (1)

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  1. from Greek ἄστρον, a star, + -μετρία, from μέτρον, a measure.
 

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/æsˈtrɑmɛtri/
by American Heritage

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