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Astronomy · L4 · Building a Star's Space Velocity

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The measurement chain from proper motion and radial velocity to a full three-dimensional space velocity.

by @openstemUpdated Astronomy
Measure proper motion: angular rate on skyMeasure distance: e.g. via parallaxCompute tangential velocity from proper motion and distanceMeasure radial velocity: Doppler shiftCombine tangential and radial velocityFull 3D space velocity

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