noun
galaxy; island universe
Astronomical term; historically used to describe galaxies as separate 'island universes' before the modern understanding of galaxies was fully established. Now somewhat dated but still encountered in older texts and poetic contexts.
アンドロメダ銀河は、かつて島宇宙と呼ばれた。
The Andromeda Galaxy was once called an island universe.
島宇宙という言葉は、宇
The term 'island universe' poetically expresses the vastness of the cosmos.