noun
different planet; another planet; alien world
Refers to a planet other than Earth, often in science fiction or speculative contexts. Commonly used in compounds like 異星人 (alien being).
彼は異星の風景を想像して絵を描いた。
He painted a picture imagining the landscape of an alien planet.
SF小説では、異星の文明がよく登場する。
In science fiction novels, civilizations from other planets often appear.