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stellar encounter

(stars moving close to each other)

A stellar encounter is stars passing sufficiently close to each other to affect their trajectory significantly. Such encounters are rare outside highly dense regions such as galactic clusters, and result in Coulomb-like scattering on a stellar scale. An encounter sufficiently close that a star's change in velocity has a magnitude similar to its velocity compared to the average of its stellar neighbors, is termed a strong stellar encounter, and one producing less of a velocity change, a weak stellar encounter.

(stars,event type)

Referenced by:
high-velocity star