peculiar velocity


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Noun1.peculiar velocity - velocity with respect to the local standard of rest
speed, velocity - distance travelled per unit time
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There's about 10-20% uncertainty in the peculiar velocity measurement for an individual galaxy.
Laniakea: our home supercluster
The galaxy density field shows you where there are concentrations of matter, and the peculiar velocity field points in the direction of the net effect of all the local over- and under-densities.
Universe Measured to One-Percent Accuracy
As shown below this definition implies that the peculiar velocity is a time varying velocity of light, and therefore a new definition is proposed where the speed of light is constant.
On the luminosity distance and the hubble constant

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