noun which may take the genitive case particle 'no'
farthest; furthest; most remote
Used as a no-adjective to describe the most distant point in space or time. Often appears in technical or formal contexts.
地球から最遠の惑星は海王星です。
The farthest planet from Earth is Neptune.
最遠地点に到達するまであと数時間かかる。
It will take a few more hours to reach the most remote point.