noun which may take the genitive case particle 'no', noun
Describes a place, time, or state that is very far away, often with a poetic or emphatic nuance. Commonly used as a noun or with の to modify another noun.
遥か彼方の星を見つめる。
I gaze at a star far, far away.
成功はまだ遥か彼方だ。
Success is still a long way off.
遠く is a more common, everyday word for 'far away'. 遥か彼方 is more emphatic and literary, suggesting a vast, almost unreachable distance.
Compound of 遥か (far, distant) and 彼方 (that direction, beyond). The exact historical derivation is uncertain, but the combination intensifies the sense of great distance.