Astrophysics (index)about


(precise measurement of the position and movement of stars)

Astrometry is the branch of astronomy for measuring the position of celestial bodies such as stars. I've also seen it described as the precise measurement of bodies on the Celestial Sphere. The first definition includes some resulting analysis/interpretation.

Precise measurement of the apparent motion of a star in the sky can reveal its distance through Parallax, or can reflect actual movement, showing something of its motion vector, or can indicate an Astrometric Binary or the presence of an Extra Solar Planet.


Referenced by:
Astrometric Binary
Bonner Durchmusterung Catalog (BD)
European Southern Observatory Very Large Telescope (ESO VLT)
Extra Solar Planet
Moving-Cluster Method
Position-Position-Velocity Space (PPV)
Red Noise
SkyMapper Southern Survey (SMSS)
Stellar Distance Determination
Stellar Mass Determination
Stellar Parameter Determination