Is there any way to tell matter from antimatter without touching it?

If you met an alien ship in intergalactic space, could you tell if it was made of antimatter by looking at it?  Is there any question you could ask the aliens that could help you tell what they were made of? 

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  • Dixon
    Lv 7
    1 month ago
    Favorite Answer

    From visual inspection alone I don't think you could tell. And asking questions would probably not help if there were no common 3rd party objects to use as reference. But if there were known common 3rd party objects, you could essentially ask if they considered those objects to be matter (their matter) or antimatter.

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