Astrometry: Difference between revisions
Astrometry is the part of Astronomy that deals with positions and movements of celestial bodies |
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= Astrometry = |
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Astrometry is a part of [[Astronomy]] and deals with the positions of stars and other celestial bodies, their distances and movements. |
Astrometry is a part of [[Astronomy]] and deals with the positions of stars and other celestial bodies, their distances and movements. |
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Apart from the fundamental function of providing Astronomers with a reference frame to report their observations in, Astrometry is also fundamental for fields like [[ |
Apart from the fundamental function of providing Astronomers with a reference frame to report their observations in, Astrometry is also fundamental for fields like [[celestial mechanics]], [[stellar dynamics]] and [[galactic astronomy]]. It is also instrumental for keeping [[time]], in that [[UTC]] is basically the [[atomic time]] synchronized to the [[Earth]]'s rotation by means of exact observations. |
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Revision as of 13:25, 27 July 2001
Astrometry is a part of Astronomy and deals with the positions of stars and other celestial bodies, their distances and movements.
It is one of the oldest subfields of the science, dating back at least to Hipparcos, who compiled the first catalogue of stars visible to him and in doing so invented the brightness scale basically still in use today. In 1750, Simon Newcomb founded modern Astrometry.
Apart from the fundamental function of providing Astronomers with a reference frame to report their observations in, Astrometry is also fundamental for fields like celestial mechanics, stellar dynamics and galactic astronomy. It is also instrumental for keeping time, in that UTC is basically the atomic time synchronized to the Earth's rotation by means of exact observations.