Left: simple vector derivation of the observed velocity of a star with galactic longitude l and distance r. Right: recasting the relations for radial and tangential velocity using Oort's constants A and B.
Observing Galactic Rotation from the Sun |
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Left: simple vector derivation of the observed velocity of a star with galactic longitude l and distance r. Right: recasting the relations for radial and tangential velocity using Oort's constants A and B. |