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> With SETI, we explicitly make the assumption that any prospective aliens are using communications technology that can be intercepted by us. And they probably
by charlesdm 11y ago
> With SETI, we explicitly make the assumption that any prospective aliens are using communications technology that can be intercepted by us.
And they probably are not. :-)
- mcv 11y agoThat's what I suspect. From what I understand, we wouldn't be able to detect our own radio broadcasts from more than half a light year away. The only realistic way in which we might detect alien radio signals is if they were either really close, or they're using a focused beam aimed directly at us. Which would imply they know we're here and listening. It all seems a bit unlikely. Detecting alien megastructures, though, there might be something to that.