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Question
ch. 4 quiz 2
a telescope detects a faint, irregular galaxy with high redshift. what can astronomers infer about this galaxy?
it is older than most spiral galaxies
it is part of the milky way
it is very close and moving toward us
it is young and located far away
Redshift is related to the Doppler effect for light. A high redshift indicates that the galaxy is moving away from us. According to Hubble's law, the greater the redshift, the farther away the object is. Also, in the early universe (when galaxies were young), there were more irregular - shaped galaxies. Spiral galaxies formed later as the universe evolved.
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It is young and located far away.