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Most nearby stars move relative to the Sun at speeds below about 30 km/s. Suppos

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Most nearby stars move relative to the Sun at speeds below about 30 km/s. Suppos

Most nearby stars move relative to the Sun at speeds below about 30 km/s. Suppose you observe a nearby star that is moving much faster than this (say, 300 km/s). Which of the following is a likely explanation for its high speed?
A) It is probably a halo star that is currently passing through the disk.
B) It is a very young star, recently formed.
C) It has been pushed to high speed by the shock wave from a nearby supernova.
D) It is a very high mass star.

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