無む人じん探たん査さ機き

Meanings

1

noun

unmanned probe; uncrewed spacecraft

Refers to a robotic spacecraft or vessel sent to explore space or other environments without a human crew.

investigate

機loom, mechanism, machine

探たん査さ機き
探査機 is a general probe or explorer, which can be manned or unmanned. 無人探査機 explicitly specifies that it is unmanned.
宇う宙ちゅう探たん査さ機き
宇宙探査機 is a space probe, often unmanned by default, but 無人探査機 emphasizes the lack of a crew.

Compound of 無人 (unmanned) + 探査機 (probe, explorer).