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terrestrial, adjective: on or relating to the earth. (emphasis mine)

Extraterrestrial, adjective: Originating, located, or occurring outside Earth or its atmosphere. (Emphasis mine.)

A neat feature for HN would be a built in dictionary tool that would allow users to select their intended meaning for ambiguous words.

Especially since the demographic is prone to being literal.

These moons are terrestrial.

extrajoviastrial