Category

Stars

Proper Motion

This video lesson is apart of a group of video lessons on Stellar Motion. Consult Radial Velocity and Stellar Motion for a context of how Proper Motion is part of the collective view of how objects in the Universe move.

Proper Motion is essentially the tangential motion of an object that weobserve on the night sky.

Measuring this motion is performed via Astrometry and often accomplished over many years as opposed to deriving a Radial Motion which is fairly instantaneous when an object’s spectra is analyzed

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