Yes, I know "extraterrestrial" literally means "not of this earth" but colloquially in the US it's used to mean the equivalent of "not of human origins" or "alien".
The point I was trying to make is that it's unlikely that any revelations will be about encountering, either intentionally or unintentionally, another culture or technology from outside our own gravity well.
The point I was trying to make is that it's unlikely that any revelations will be about encountering, either intentionally or unintentionally, another culture or technology from outside our own gravity well.