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For questions about a different and uncharacteristic species or object that has come to the world from another world. NOT for questions about extraterrestrials in their native environment.

18 votes

Would we ever find an alien space probe?

Assuming the aliens have technology similar to us, yes, we would definitely notice them. … The aliens would have to load the ship with enough fuel to accelerate for up to half of the trip from their system to ours, then turn around in the middle and blast the solar system with the energetic …
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