peculiar velocity

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  • noun

Words related to peculiar velocity

velocity with respect to the local standard of rest

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Peculiar velocities are on the order of a few hundred kilometers per second, whereas cosmic expansion velocities rise to several thousand km/s in the nearby universe, reaching 10,000 km/s roughly 130 million light-years out.
Galaxies in dense clusters orbit those clusters' massive cores at especially large peculiar velocities.
We were in the middle of the survey when I noticed a few of the stars, which happened to be very red, had rather peculiar velocities, different from the rest of the stars," says Ibata.
Such peculiar velocities, as these "extra" motions are called, are presumably due to the gravitational attraction between neighbouring galaxies (March issue, page 18).
0] - called peculiar velocities - that reveal the underlying distribution of dark matter.