Key issues for SETI
Several key issues for SETI must be addressed before we can conduct an efficient search. These include the number of potential star systems as a function of distance, the sender’s choice of broadcast versus targeted signaling, the possibility of sensor probes, and whether we ourselves should be sending signals — the significance of the latter issue being that an alien civilization might be reluctant to reveal its existence to us.
KeywordsPhoton Density Main Sequence Star Star System Habitable Zone Host Star
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