In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

A starburst galaxy is a galaxy with a very high rate of star formation .
A starburst galaxy is a galaxy undergoing an exceptionally high rate of star formation , as compared to the long-term average rate of star formation in the galaxy or the star formation rate observed in most other galaxies .