starburst galaxy
An astronomy term for a galaxy undergoing an exceptionally high rate of star formation. Often contrasted with more quiescent galaxies.
See also: スターバースト銀河 (スターバーストぎんが)
Monster galaxies produce stars at a much faster rate than ordinary galaxies.
Astronomers are observing many monster galaxies in the distant universe.
From English 'monster' + 銀河 (galaxy), referring to a galaxy with extreme star formation activity. The term is a direct calque used in Japanese astronomy.